This is a multinational, multicentre, randomised open-label, controlled, parallel-group phase III study. Its aim is to demonstrate that a single intracoronary infusion of autologous bone marrow-derived mononuclear cells is safe and reduces all-cause mortality in patients with reduced left ventricular ejection fraction(</=45%) after successful reperfusion for acute myocardial infarction when compared to a control group of patients undergoing best medical care.