Population Adult male or female patients aged < 80 years with acute myocardial infarction undergoing successful primary or rescue percutaneous recanalization of the infarct-related coronary artery, defined as TIMI 3 flow and residual stenosis <20%) within 24 hours of symptom onset and Left Ventricular Ejection Fraction (LVEF) ≤ 45% at 3-6 after revascularization, as documented by a two-dimensional echocardiogram.