The cases undergoing C.A.B.G with poor cardiac function, in which L.V. ejection had less than 40% the use of levosimendan perioperatively decrease the operative time, cross clamp time, facilitate the weaning from cardiomachine decrease the need of conventional inotropic support, decrease the duration of postoperative ventilation, improve the tissue perfusion, cardiac output parameters,length of I.C.U, hospital stay with decreasing early postoperative mortality, it had high degree of drug safety, tolerability. Further study needed for the critical of levosimendan in different type of cardiac surgery