 Low output syndrome is a common complication in patients undergoing cardiac surgery. Its incidence was reported to be 2 to 6 1. In patients suffering from low output syndrome cardiac output is severely reduced due to myocardial failure. Among other reasons for myocardial failure, ischemia, insufficient myocardial protection during aortic cross-clamping, and severely reduced ventricular function prior surgery are the most common risk factors for low output syndrome. Low output syndrome is treated with positive inotropic drugs and mechanical assist devices 2. Morbidity and mortality of low output syndrome is high and the costs for treating the disease are immense. 