SUMMARYDiabetic neuropathy is probably the most common chronic complication of diabetes that encompass a wide range of abnormalities affecting the peripheral nervous system causing considerable morbidity and mortality. The prevelance of diabetic neuropathy approaches 50% in most diabetic populations, and its consequences in the form of foot ulceration and leg amputation may be mandatory as there is no curative therapy for diabetic neuropathies.Uramic Neuropathy develops during the course of chronic kidney disease and it is present in up to 65% of patients at the initiation of dialysis, and the severity of neuropathy is correlated strongly with the severity of the renal insufficiency.Nerve growth factor (NGF) is a neurotrophic polypeptide, belongs to a closely related family of neurotrophins composed of brain-derived neurotrophic factor, neurotrophin-3, and neurotrophin-4/5. it selectively promotes the differentiation and maintenance of small fibre sensory and sympathetic neurons in the peripheral nervous system. Later studies have suggested that decreased availability of NGF contributes to the pathogenesis of diabetic polyneuropathy.The present study was aimed to find out how much the changes in the level of nerve growth factor and nerve conduction velocity in some types of neuropathy (diabetic and uraemic) and to find out any relation between serum level of nerve growth factor and each of degree of glycemic control , duration and type of diabetes in diabetic subjects, to the degree of renal affection and sufficient dialysis in uraemic patients and to the degree of neuropathy and nerve conduction velocity in different types of neuropathy.This study had been carried out on 90 subjects, they were divided into 3 groups.Group I- included 10 healthy subjects as a control group.Group IIa- it included 40 patients with diabetic peripheral neuropathy 20 0f them with type I diabetes mellitus and the other 20 with type II diabetes mellitus).Group II b- it included 40 patients with uraemic peripheral neuropathy, 20 of them under conservative treatment and the other 20 on regular dialysis (pertonial or haemodialysis)} .All subjects of this study subjected to the following investigations: liver function tests, kidney function tests ,complete blood picture, fasting and 2 hours postprandial blood glucose level , glycosylated haemoglobin (HBA1c), urine and stool analysis, E.S.R., lipid profils, serum nerve growth level and nerve conduction velocity measurment.The following results were obtained:? There was a significant decrease in the serum nerve growth factor levels and nerve conduction velocity in the whole groups compared to the control .? There was a significant decrease in the serum nerve growth factor levels and nerve conduction velocity in type 1diabetic patients as compared to type II.? A highly significant negative correlation was found between both of nerve growth factor (NGF) and nerve conuction velocity (NCV) to each of fasting blood glucose, glcosylated haemoglbulin, duration of diabetes, symptoms and examination scores in diabetic patients with peripheral neuropathy.? There was a significant positive correlation between neuropathy scores and each of fasting blood glucose,glcosylated haemoglbulin,and duration of diabetes ,while there was a highly significant negative correlation with nerve conduction velocity of four measured nerves in diabetic patients with P.N..? A significant decrease in the serum nerve growth factor and nerve conduction velocity was found in chronic renal failure patients on conservative treatment as compared to these on regular dialysis.? A highly significant negative correlation was found between both of nerve growth factor and nerve conuction velocity to each of serum urea, and serum creatinine and symptoms and examination scores . while there was non significant correlation between them and duration of dialysis in uraemic patients with peripheral neuropathy .? There was significant positive correlation between neuropathy scores and each of serum urea, and serum creatinine , while there was a highly significant negative correlation with duration of dialysis and nerve conduction velocity of four measured nerves ,in uraemic patients with peripheral neuropathy.CONCLUSION AND RECOMMENDATIONFrom the previous results, it is clear that serum nerve growth factor is decreased in patients with peripheral neuropathy and this reduction is closely related to control, duration, and type of diabetes in diabetic patients, and to the degree of renal affection , while there is no relation between this reduction and duration of dialysis in uraemic patients. Nerve growth factor deficiency may be responsible for the pathogenesis of neuropathy which occurs in such patients. Therefore modulation of nerve growth factor may offer hope for patients with peripheral neuropathy and will open new therapeutic era in mangment of peripheral neuropathy in new future.and also both good diabetic control and foot care are very important in improvment of diabetic peripheral neuropathy in diabetic subjects.-SUMMARYDiabetic neuropathy is probably the most common chronic complication of diabetes that encompass a wide range of abnormalities affecting the peripheral nervous system causing considerable morbidity and mortality. The prevelance of diabetic neuropathy approaches 50% in most diabetic populations, and its consequences in the form of foot ulceration and leg amputation may be mandatory as there is no curative therapy for diabetic neuropathies.Uramic Neuropathy develops during the course of chronic kidney disease and it is present in up to 65% of patients at the initiation of dialysis, and the severity of neuropathy is correlated strongly with the severity of the renal insufficiency.Nerve growth factor (NGF) is a neurotrophic polypeptide, belongs to a closely related family of neurotrophins composed of brain-derived neurotrophic factor, neurotrophin-3, and neurotrophin-4/5. it selectively promotes the differentiation and maintenance of small fibre sensory and sympathetic neurons in the peripheral nervous system. Later studies have suggested that decreased availability of NGF contributes to the pathogenesis of diabetic polyneuropathy.The present study was aimed to find out how much the changes in the level of nerve growth factor and nerve conduction velocity in some types of neuropathy (diabetic and uraemic) and to find out any relation between serum level of nerve growth factor and each of degree of glycemic control , duration and type of diabetes in diabetic subjects, to the degree of renal affection and sufficient dialysis in uraemic patients and to the degree of neuropathy and nerve conduction velocity in different types of neuropathy.This study had been carried out on 90 subjects, they were divided into 3 groups.Group I- included 10 healthy subjects as a control group.Group IIa- it included 40 patients with diabetic peripheral neuropathy 20 0f them with type I diabetes mellitus and the other 20 with type II diabetes mellitus).Group II b- it included 40 patients with uraemic peripheral neuropathy, 20 of them under conservative treatment and the other 20 on regular dialysis (pertonial or haemodialysis)} .All subjects of this study subjected to the following investigations: liver function tests, kidney function tests ,complete blood picture, fasting and 2 hours postprandial blood glucose level , glycosylated haemoglobin (HBA1c), urine and stool analysis, E.S.R., lipid profils, serum nerve growth level and nerve conduction velocity measurment.The following results were obtained:? There was a significant decrease in the serum nerve growth factor levels and nerve conduction velocity in the whole groups compared to the control .? There was a significant decrease in the serum nerve growth factor levels and nerve conduction velocity in type 1diabetic patients as compared to type II.? A highly significant negative correlation was found between both of nerve growth factor (NGF) and nerve conuction velocity (NCV) to each of fasting blood glucose, glcosylated haemoglbulin, duration of diabetes, symptoms and examination scores in diabetic patients with peripheral neuropathy.? There was a significant positive correlation between neuropathy scores and each of fasting blood glucose,glcosylated haemoglbulin,and duration of diabetes ,while there was a highly significant negative correlation with nerve conduction velocity of four measured nerves in diabetic patients with P.N..? A significant decrease in the serum nerve growth factor and nerve conduction velocity was found in chronic renal failure patients on conservative treatment as compared to these on regular dialysis.Group A: with TIAs of less than 15 minutes.Group B: with TIAs from 16 minutes to 30 minutes.Group C: with TIAs form 30 minutes to 60 minutes .All patients were subjected to the following:1- Detailed history taking.2- Complete general and neurological examination.3- Laboratory investigations:4- ECG (electrocardiography)5- Brain computed tomograhpy6- Transcranial Doppler7- Extracranial carotid DopplerThe results showed that:- Ther was male predomenence over females in both groups.- The prevalence of stroke risk factors were more common in group I than that of groupII.- The Canadian neurological scale was slightly higher in-group II with a higher scores among group A.- Among the patients of group II the outcome was favorable more than that of the first group according to Barthel index, the most favorable outcome was seen in subgroup A.- Favorable outcome was the best in patients with one week elapse time between the previous TIA and the onset of stroke.- Favorable outcome was better in patients who had 2 or 3 TIAs before their stroke.- Group II patients had smaller sized infarcts in CT than in group I patients.- -The mean cerebral blood flow velocities was lower on the affected side than the non affected side.In conclusion we do not state that TIA prevents ischemic stroke but if TIA occurs in the same vascular territory within a time window (4-14 days) and for short periods (less than 30 minutes) the clinical picture may become less severe and the outcome better after an ischemic stroke.RecommendationThis study like some other studies lead us to pay more attention to all risk factors of ischemic stroke and those with history of TIA to be fully investigated to identify the cause of TIA and to manage them and to be followed up to avoid evolving of cerebral infarction and these results may lead in the future to preventive medicine that target certain genes, drugs and/or combination therapy of ischemic stroke to create a neuroprotective effect against ischemic strokeSUMMARY AND CONCLUSIONOur study was done to show the effect of previous TIA in patients after their ischemic stroke in the anterior circulation and to clarify the neuroprotective effect of TIA through comparing the severity of clinical picture on admission and the outcome of stroke in patients with and without previous TIA.50 stroke patients was studied during the period from December 2003 to November 2004. There age range from 43 to 75 with mean age of (m ± SD = 60.8 ± 4.80).According to the presence or absence of previous TIA, our patients were divided into two groups:(Group I): (25 patients) with no past history of TIA (25 patients)(Group II): (25 patients) with previous one or more TIAs in the anterior circulation. We subdivided this group into:Group A: with TIAs of less than 15 minutes.Group B: with TIAs from 16 minutes to 30 minutes.Group C: with TIAs form 30 minutes to 60 minutes .All patients were subjected to the following:1- Detailed history taking.2- Complete general and neurological examination.3- Laboratory investigations:4- ECG (electrocardiography)5- Brain computed tomograhpy6- Transcranial Doppler7- Extracranial carotid DopplerThe results showed that:- Ther was male predomenence over females in both groups.- The prevalence of stroke risk factors were more common in group I than that of groupII.- The Canadian neurological scale was slightly higher in-group II with a higher scores among group A.- Among the patients of group II the outcome was favorable more than that of the first group according to Barthel index, the most favorable outcome was seen in subgroup A.- Favorable outcome was the best in patients with one week elapse time between the previous TIA and the onset of stroke.- Favorable outcome was better in patients who had 2 or 3 TIAs before their stroke.- Group II patients had smaller sized infarcts in CT than in group I patients.- -The mean cerebral blood flow velocities was lower on the affected side than the non affected side.In conclusion we do not state that TIA prevents ischemic stroke but if TIA occurs in the same vascular territory within a time window (4-14 days) and for short periods (less than 30 minutes) the clinical picture may become less severe and the outcome better after an ischemic stroke.RecommendationThis study like some other studies lead us to pay more attention to all risk factors of ischemic stroke and those with history of TIA to be fully investigated to identify the cause of TIA and to manage them and to be followed up to avoid evolving of cerebral infarction and these results may lead in the future to preventive medicine that target certain genes, drugs and/or combination therapy of ischemic stroke to create a neuroprotective effect against ischemic strokeSUMMARY AND CONCLUSIONOur study was done to show the effect of previous TIA in patients after their ischemic stroke in the anterior circulation and to clarify the neuroprotective effect of TIA through comparing the severity of clinical picture on admission and the outcome of stroke in patients with and without previous TIA.50 stroke patients was studied during the period from December 2003 to November 2004. There age range from 43 to 75 with mean age of (m ± SD = 60.8 ± 4.80).According to the presence or absence of previous TIA, our patients were divided into two groups:(Group I): (25 patients) with no past history of TIA (25 patients)(Group II): (25 patients) with previous one or more TIAs in the anterior circulation. We subdivided this group into:Group A: with TIAs of less than 15 minutes.Group B: with TIAs from 16 minutes to 30 minutes.Group C: with TIAs form 30 minutes to 60 minutes .All patients were subjected to the following:1- Detailed history taking.2- Complete general and neurological examination.3- Laboratory investigations:4- ECG (electrocardiography)5- Brain computed tomograhpy6- Transcranial Doppler7- Extracranial carotid DopplerThe results showed that:- Ther was male predomenence over females in both groups.- The prevalence of stroke risk factors were more common in group I than that of groupII.- The Canadian neurological scale was slightly higher in-group II with a higher scores among group A.- Among the patients of group II the outcome was favorable more than that of the first group according to Barthel index, the most favorable outcome was seen in subgroup A.- Favorable outcome was the best in patients with one week elapse time between the previous TIA and the onset of stroke.- Favorable outcome was better in patients who had 2 or 3 TIAs before their stroke.- Group II patients had smaller sized infarcts in CT than in group I patients.- -The mean cerebral blood flow velocities was lower on the affected side than the non affected side.In conclusion we do not state that TIA prevents ischemic stroke but if TIA occurs in the same vascular territory within a time window (4-14 days) and for short periods (less than 30 minutes) the clinical picture may become less severe and the outcome better after an ischemic stroke.RecommendationThis study like some other studies lead us to pay more attention to all risk factors of ischemic stroke and those with history of TIA to be fully investigated to identify the cause of TIA and to manage them and to be followed up to avoid evolving of cerebral infarction and these results may lead in the future to preventive medicine that target certain genes, drugs and/or combination therapy of ischemic stroke to create a neuroprotective effect against ischemic strokeSUMMARY AND CONCLUSIONOur study was done to show the effect of previous TIA in patients after their ischemic stroke in the anterior circulation and to clarify the neuroprotective effect of TIA through comparing the severity of clinical picture on admission and the outcome of stroke in patients with and without previous TIA.50 stroke patients was studied during the period from December 2003 to November 2004. There age range from 43 to 75 with mean age of (m ± SD = 60.8 ± 4.80).According to the presence or absence of previous TIA, our patients were divided into two groups:(Group I): (25 patients) with no past history of TIA (25 patients)(Group II): (25 patients) with previous one or more TIAs in the anterior circulation. We subdivided this group into:Group A: with TIAs of less than 15 minutes.Group B: with TIAs from 16 minutes to 30 minutes.Group C: with TIAs form 30 minutes to 60 minutes .All patients were subjected to the following:1- Detailed history taking.2- Complete general and neurological examination.3- Laboratory investigations:4- ECG (electrocardiography)5- Brain computed tomograhpy6- Transcranial Doppler7- Extracranial carotid DopplerThe results showed that:- Ther was male predomenence over females in both groups.- The prevalence of stroke risk factors were more common in group I than that of groupII.- The Canadian neurological scale was slightly higher in-group II with a higher scores among group A.- Among the patients of group II the outcome was favorable more than that of the first group according to Barthel index, the most favorable outcome was seen in subgroup A.- Favorable outcome was the best in patients with one week elapse time between the previous TIA and the onset of stroke.- Favorable outcome was better in patients who had 2 or 3 TIAs before their stroke.- Group II patients had smaller sized infarcts in CT than in group I patients.- -The mean cerebral blood flow velocities was lower on the affected side than the non affected side.In conclusion we do not state that TIA prevents ischemic stroke but if TIA occurs in the same vascular territory within a time window (4-14 days) and for short periods (less than 30 minutes) the clinical picture may become less severe and the outcome better after an ischemic stroke.RecommendationThis study like some other studies lead us to pay more attention to all risk factors of ischemic stroke and those with history of TIA to be fully investigated to identify the cause of TIA and to manage them and to be followed up to avoid evolving of cerebral infarction and these results may lead in the future to preventive medicine that target certain genes, drugs and/or combination therapy of ischemic stroke to create a neuroprotective effect against ischemic strokeSUMMARY AND CONCLUSIONOur study was done to show the effect of previous TIA in patients after their ischemic stroke in the anterior circulation and to clarify the neuroprotective effect of TIA through comparing the severity of clinical picture on admission and the outcome of stroke in patients with and without previous TIA.50 stroke patients was studied during the period from December 2003 to November 2004. There age range from 43 to 75 with mean age of (m ± SD = 60.8 ± 4.80).According to the presence or absence of previous TIA, our patients were divided into two groups:(Group I): (25 patients) with no past history of TIA (25 patients)(Group II): (25 patients) with previous one or more TIAs in the anterior circulation. We subdivided this group into:Group A: with TIAs of less than 15 minutes.Group B: with TIAs from 16 minutes to 30 minutes.Group C: with TIAs form 30 minutes to 60 minutes .All patients were subjected to the following:1- Detailed history taking.2- Complete general and neurological examination.3- Laboratory investigations:4- ECG (electrocardiography)5- Brain computed tomograhpy6- Transcranial Doppler7- Extracranial carotid DopplerThe results showed that:- Ther was male predomenence over females in both groups.- The prevalence of stroke risk factors were more common in group I than that of groupII.- The Canadian neurological scale was slightly higher in-group II with a higher scores among group A.- Among the patients of group II the outcome was favorable more than that of the first group according to Barthel index, the most favorable outcome was seen in subgroup A.- Favorable outcome was the best in patients with one week elapse time between the previous TIA and the onset of stroke.- Favorable outcome was better in patients who had 2 or 3 TIAs before their stroke.- Group II patients had smaller sized infarcts in CT than in group I patients.- -The mean cerebral blood flow velocities was lower on the affected side than the non affected side.In conclusion we do not state that TIA prevents ischemic stroke but if TIA occurs in the same vascular territory within a time window (4-14 days) and for short periods (less than 30 minutes) the clinical picture may become less severe and the outcome better after an ischemic stroke.RecommendationThis study like some other studies lead us to pay more attention to all risk factors of ischemic stroke and those with history of TIA to be fully investigated to identify the cause of TIA and to manage them and to be followed up to avoid evolving of cerebral infarction and these results may lead in the future to preventive medicine that target certain genes, drugs and/or combination therapy of ischemic stroke to create a neuroprotective effect against ischemic strokeSUMMARY AND CONCLUSIONOur study was done to show the effect of previous TIA in patients after their ischemic stroke in the anterior circulation and to clarify the neuroprotective effect of TIA through comparing the severity of clinical picture on admission and the outcome of stroke in patients with and without previous TIA.50 stroke patients was studied during the period from December 2003 to November 2004. There age range from 43 to 75 with mean age of (m ± SD = 60.8 ± 4.80).According to the presence or absence of previous TIA, our patients were divided into two groups:(Group I): (25 patients) with no past history of TIA (25 patients)(Group II): (25 patients) with previous one or more TIAs in the anterior circulation. We subdivided this group into:Group A: with TIAs of less than 15 minutes.Group B: with TIAs from 16 minutes to 30 minutes.Group C: with TIAs form 30 minutes to 60 minutes .All patients were subjected to the following:1- Detailed history taking.2- Complete general and neurological examination.3- Laboratory investigations:4- ECG (electrocardiography)5- Brain computed tomograhpy6- Transcranial Doppler7- Extracranial carotid DopplerThe results showed that:- Ther was male predomenence over females in both groups.- The prevalence of stroke risk factors were more common in group I than that of groupII.- The Canadian neurological scale was slightly higher in-group II with a higher scores among group A.- Among the patients of group II the outcome was favorable more than that of the first group according to Barthel index, the most favorable outcome was seen in subgroup A.- Favorable outcome was the best in patients with one week elapse time between the previous TIA and the onset of stroke.- Favorable outcome was better in patients who had 2 or 3 TIAs before their stroke.- Group II patients had smaller sized infarcts in CT than in group I patients.- -The mean cerebral blood flow velocities was lower on the affected side than the non affected side.In conclusion we do not state that TIA prevents ischemic stroke but if TIA occurs in the same vascular territory within a time window (4-14 days) and for short periods (less than 30 minutes) the clinical picture may become less severe and the outcome better after an ischemic stroke.RecommendationThis study like some other studies lead us to pay more attention to all risk factors of ischemic stroke and those with history of TIA to be fully investigated to identify the cause of TIA and to manage them and to be followed up to avoid evolving of cerebral infarction and these results may lead in the future to preventive medicine that target certain genes, drugs and/or combination therapy of ischemic stroke to create a neuroprotective effect against ischemic strokeSUMMARY AND CONCLUSIONOur study was done to show the effect of previous TIA in patients after their ischemic stroke in the anterior circulation and to clarify the neuroprotective effect of TIA through comparing the severity of clinical picture on admission and the outcome of stroke in patients with and without previous TIA.50 stroke patients was studied during the period from December 2003 to November 2004. There age range from 43 to 75 with mean age of (m ± SD = 60.8 ± 4.80).According to the presence or absence of previous TIA, our patients were divided into two groups:(Group I): (25 patients) with no past history of TIA (25 patients)(Group II): (25 patients) with previous one or more TIAs in the anterior circulation. We subdivided this group into:Group A: with TIAs of less than 15 minutes.Group B: with TIAs from 16 minutes to 30 minutes.Group C: with TIAs form 30 minutes to 60 minutes .All patients were subjected to the following:1- Detailed history taking.2- Complete general and neurological examination.3- Laboratory investigations:4- ECG (electrocardiography)5- Brain computed tomograhpy6- Transcranial Doppler7- Extracranial carotid DopplerThe results showed that:- Ther was male predomenence over females in both groups.- The prevalence of stroke risk factors were more common in group I than that of groupII.- The Canadian neurological scale was slightly higher in-group II with a higher scores among group A.- Among the patients of group II the outcome was favorable more than that of the first group according to Barthel index, the most favorable outcome was seen in subgroup A.- Favorable outcome was the best in patients with one week elapse time between the previous TIA and the onset of stroke.- Favorable outcome was better in patients who had 2 or 3 TIAs before their stroke.- Group II patients had smaller sized infarcts in CT than in group I patients.- -The mean cerebral blood flow velocities was lower on the affected side than the non affected side.In conclusion we do not state that TIA prevents ischemic stroke but if TIA occurs in the same vascular territory within a time window (4-14 days) and for short periods (less than 30 minutes) the clinical picture may become less severe and the outcome better after an ischemic stroke.RecommendationThis study like some other studies lead us to pay more attention to all risk factors of ischemic stroke and those with history of TIA to be fully investigated to identify the cause of TIA and to manage them and to be followed up to avoid evolving of cerebral infarction and these results may lead in the future to preventive medicine that target certain genes, drugs and/or combination therapy of ischemic stroke to create a neuroprotective effect against ischemic strokeSUMMARY AND CONCLUSIONOur study was done to show the effect of previous TIA in patients after their ischemic stroke in the anterior circulation and to clarify the neuroprotective effect of TIA through comparing the severity of clinical picture on admission and the outcome of stroke in patients with and without previous TIA.50 stroke patients was studied during the period from December 2003 to November 2004. There age range from 43 to 75 with mean age of (m ± SD = 60.8 ± 4.80).According to the presence or absence of previous TIA, our patients were divided into two groups:(Group I): (25 patients) with no past history of TIA (25 patients)(Group II): (25 patients) with previous one or more TIAs in the anterior circulation. We subdivided this group into:Group A: with TIAs of less than 15 minutes.Group B: with TIAs from 16 minutes to 30 minutes.Group C: with TIAs form 30 minutes to 60 minutes .All patients were subjected to the following:1- Detailed history taking.2- Complete general and neurological examination.3- Laboratory investigations:4- ECG (electrocardiography)5- Brain computed tomograhpy6- Transcranial Doppler7- Extracranial carotid DopplerThe results showed that:- Ther was male predomenence over females in both groups.- The prevalence of stroke risk factors were more common in group I than that of groupII.- The Canadian neurological scale was slightly higher in-group II with a higher scores among group A.- Among the patients of group II the outcome was favorable more than that of the first group according to Barthel index, the most favorable outcome was seen in subgroup A.- Favorable outcome was the best in patients with one week elapse time between the previous TIA and the onset of stroke.- Favorable outcome was better in patients who had 2 or 3 TIAs before their stroke.- Group II patients had smaller sized infarcts in CT than in group I patients.- -The mean cerebral blood flow velocities was lower on the affected side than the non affected side.In conclusion we do not state that TIA prevents ischemic stroke but if TIA occurs in the same vascular territory within a time window (4-14 days) and for short periods (less than 30 minutes) the clinical picture may become less severe and the outcome better after an ischemic stroke.RecommendationThis study like some other studies lead us to pay more attention to all risk factors of ischemic stroke and those with history of TIA to be fully investigated to identify the cause of TIA and to manage them and to be followed up to avoid evolving of cerebral infarction and these results may lead in the future to preventive medicine that target certain genes, drugs and/or combination therapy of ischemic stroke to create a neuroprotective effect against ischemic strokeSUMMARY AND CONCLUSIONOur study was done to show the effect of previous TIA in patients after their ischemic stroke in the anterior circulation and to clarify the neuroprotective effect of TIA through comparing the severity of clinical picture on admission and the outcome of stroke in patients with and without previous TIA.50 stroke patients was studied during the period from December 2003 to November 2004. There age range from 43 to 75 with mean age of (m ± SD = 60.8 ± 4.80).According to the presence or absence of previous TIA, our patients were divided into two groups:(Group I): (25 patients) with no past history of TIA (25 patients)(Group II): (25 patients) with previous one or more TIAs in the anterior circulation. We subdivided this group into:Group A: with TIAs of less than 15 minutes.Group B: with TIAs from 16 minutes to 30 minutes.Group C: with TIAs form 30 minutes to 60 minutes .All patients were subjected to the following:1- Detailed history taking.2- Complete general and neurological examination.3- Laboratory investigations:4- ECG (electrocardiography)5- Brain computed tomograhpy6- Transcranial Doppler7- Extracranial carotid DopplerThe results showed that:- Ther was male predomenence over females in both groups.- The prevalence of stroke risk factors were more common in group I than that of groupII.- The Canadian neurological scale was slightly higher in-group II with a higher scores among group A.- Among the patients of group II the outcome was favorable more than that of the first group according to Barthel index, the most favorable outcome was seen in subgroup A.- Favorable outcome was the best in patients with one week elapse time between the previous TIA and the onset of stroke.- Favorable outcome was better in patients who had 2 or 3 TIAs before their stroke.- Group II patients had smaller sized infarcts in CT than in group I patients.- -The mean cerebral blood flow velocities was lower on the affected side than the non affected side.In conclusion we do not state that TIA prevents ischemic stroke but if TIA occurs in the same vascular territory within a time window (4-14 days) and for short periods (less than 30 minutes) the clinical picture may become less severe and the outcome better after an ischemic stroke.RecommendationThis study like some other studies lead us to pay more attention to all risk factors of ischemic stroke and those with history of TIA to be fully investigated to identify the cause of TIA and to manage them and to be followed up to avoid evolving of cerebral infarction and these results may lead in the future to preventive medicine that target certain genes, drugs and/or combination therapy of ischemic stroke to create a neuroprotective effect against ischemic strokeSUMMARY AND CONCLUSIONOur study was done to show the effect of previous TIA in patients after their ischemic stroke in the anterior circulation and to clarify the neuroprotective effect of TIA through comparing the severity of clinical picture on admission and the outcome of stroke in patients with and without previous TIA.50 stroke patients was studied during the period from December 2003 to November 2004. There age range from 43 to 75 with mean age of (m ± SD = 60.8 ± 4.80).According to the presence or absence of previous TIA, our patients were divided into two groups:(Group I): (25 patients) with no past history of TIA (25 patients)(Group II): (25 patients) with previous one or more TIAs in the anterior circulation. We subdivided this group into:Group A: with TIAs of less than 15 minutes.Group B: with TIAs from 16 minutes to 30 minutes.Group C: with TIAs form 30 minutes to 60 minutes .All patients were subjected to the following:1- Detailed history taking.2- Complete general and neurological examination.3- Laboratory investigations:4- ECG (electrocardiography)5- Brain computed tomograhpy6- Transcranial Doppler7- Extracranial carotid DopplerThe results showed that:- Ther was male predomenence over females in both groups.- The prevalence of stroke risk factors were more common in group I than that of groupII.- The Canadian neurological scale was slightly higher in-group II with a higher scores among group A.- Among the patients of group II the outcome was favorable more than that of the first group according to Barthel index, the most favorable outcome was seen in subgroup A.- Favorable outcome was the best in patients with one week elapse time between the previous TIA and the onset of stroke.- Favorable outcome was better in patients who had 2 or 3 TIAs before their stroke.- Group II patients had smaller sized infarcts in CT than in group I patients.- -The mean cerebral blood flow velocities was lower on the affected side than the non affected side.In conclusion we do not state that TIA prevents ischemic stroke but if TIA occurs in the same vascular territory within a time window (4-14 days) and for short periods (less than 30 minutes) the clinical picture may become less severe and the outcome better after an ischemic stroke.RecommendationThis study like some other studies lead us to pay more attention to all risk factors of ischemic stroke and those with history of TIA to be fully investigated to identify the cause of TIA and to manage them and to be followed up to avoid evolving of cerebral infarction and these results may lead in the future to preventive medicine that target certain genes, drugs and/or combination therapy of ischemic stroke to create a neuroprotective effect against ischemic strokeSUMMARY AND CONCLUSIONOur study was done to show the effect of previous TIA in patients after their ischemic stroke in the anterior circulation and to clarify the neuroprotective effect of TIA through comparing the severity of clinical picture on admission and the outcome of stroke in patients with and without previous TIA.50 stroke patients was studied during the period from December 2003 to November 2004. There age range from 43 to 75 with mean age of (m ± SD = 60.8 ± 4.80).According to the presence or absence of previous TIA, our patients were divided into two groups:(Group I): (25 patients) with no past history of TIA (25 patients)(Group II): (25 patients) with previous one or more TIAs in the anterior circulation. We subdivided this group into:Group A: with TIAs of less than 15 minutes.1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.SUMMARYThere is growing interest in QT dispersion as a marker for arrhythmia potential being a marker of inhomogenicity of ventricular repolarization. The QT dispersion is increased in myocardial ischemia and infarction, and levels are higher in patients with ventricular arrhythmias. This study was performed to assess QT dispersion in patients with acute myocardial infarction treated with thrombolytic therapy with successful reperfusion versus those who treated with thrombolytic therapy with failed reperfusion and those who treated with conventional therapy and to correlate between QT dispersion and the complicating serious ventricular arrhythmias following acute myocardial infarction. And it is also performed to assess the influence of age, sex, obesity, smoking, diabetes mellitus, hypertension and site of infarction on QT dispersion. The study included 100 patients with recent acute myocardial infarction and they are classified to 3 groups:Group 1: 30 patients who received streptokinase with successful reperfusion.Group 2: 30 patients who received streptokinase with failed reperfusion.Group 3: 40 patients who did not receive streptokinase (control group).Every patient was subjected to full history taking and thorough clinical examination. Analysis of serum electrolytes (Na, K and ca) was done and cases showing abnormal results were excluded. Serum CPK was checked on admission, after 6 hours, after 12 hours and after 24 hours after onset of thrombolytic therapy. ECG was done for every patient on admission, two hours post thrombolytic therapy and predischarge in groups I and 2. In group 3, ECG was done on admission and predischarge.The study concluded that:1- There is a statistically significant reduction in QT dispersion in patients who received thrombolytic therapy with successful reperfusion versus those who received thrombolytic therapy with failed reperfusion and those who did not receive thrombolytic therapy.2- There is a reduction in the incidence of ventricular arrhythmias in patients with successful reperfusion therapy associated with the reduction in the QT dispersion. So, reduction of QT dispersion may be a mechanism of benefit of thrombolytic therapy.3- QT dispersion is increased after myocardial infarction and levels are higher in patients with ventricular arrhythmias.4- QT dispersion is influenced by hypertension, diabetes mellitus, age and site of infarction ,as it is increased in patients with hypertension, diabetes mellitus, age less than 50 years and with anterior than inferior infarction.The study recommended the following:1- Whenever not contraindicated, thrombolytic therapy should be administered as early as possible in cases with AMI.2- QT dispersion can predict the potential for ventricular arrhythmias in patients with AMI.3- Future studies are needed to confirm the value of QT dispersion in risk stratification after AMI.The complications associated with hypothermia were included thrombocytopenia (45%), respiratory failure (35%), oliguria (25%), convulsion (22.5%) and (NEC) (15%).The most cause of death in hypothermia was respiratory failure (35%) then pulmonary hemorrhage (30%).The mortality rate of hypothermia was (50%), on other hand the mortality affected by multiple factors (e.g) level of hypothermia; in severe hypothermia mortality was (83.3%), cause of hypothermia; in hypothermia with sepsis mortality was (71.7%) and gestation age; mortality of premature (We noted from the previous studies results that the neonatal hypothermia are still a serious problem which associated with high risk of morbidity and mortality.The outcome of hypothermia depending on multiple factors (risk factors, underlying causes, severeity of hypothermia, and the response for rapid and proper management of the patient).The hypothermic neonate need to rapid rewarming and immediately treatment of severe cases, rapid investigations for detection of the pathological causes of hypothermia with starting to treat the cause immediately to avoid prolongation of hypothermia and metabolic changes.