 Coronary heart disease CHD is the leading cause of death in the U.S. in both men and women and the aging of the population and rising prevalence of diabetes ensure that the number of persons with CHD will continue to increase over the next several decades. Two major factors contributing to adverse outcomes in patients undergoing coronary artery bypass grafting CABG surgery are failure to achieve complete revascularization, and residual impairment in left ventricular function. 