Patients will be randomized, prospectively, single blinded into one of two arms:1)intravenous administration of Eptifibatide and 2) intracoronary administration. The primary end-point will be the angiographic achievement of TIMI 3 flow at the infarct related artery and TIMI myocardial perfusion grade (blush) and the electrocardiographic surrogate of myocardial perfusion the ST segment resolution.