LVOT Diameter = LVOT Area = Post-CPB LVEF TEMPERATURE MAINTAINED ON CPB = BASE EXCESS ON CPB = CPB TIME = AXC TIME = PONV = Y/N Hemodynamic Parameters: including HR,BP,CVP,LVOT VTI,CO,CI,LVEF and vasopressor dose will be recorded 4 hourly unto 48 hours in postoperative period.