 - A significant left ventricular systolic dysfunction evaluated by echocardiography or LV angiography LV ejection fraction 45 but 25 due to prior myocardial infarction. This area of left ventricular dysfunction should be akinetic or severely hypokinetic, not dyskinetic or aneurismal, when assessed by echocardiography or LV angiogram. This territory should be irrigated by one or a branch of the three major vascular territories i.e. right coronary artery, left circumflex, or left anterior descending artery distribution that will be bypassed during the surgical procedure. 