To study the effect of a simple and fast 'modus operandi' by aspiration of thrombus and debris with the Export catheter in an acute occlusion, on microvascular (re)perfusion and late left ventricular remodeling. Subsequently determinating if PCI with primary aspiration as an adjunct is superior to standard PCI. Microvascular (re)perfusion will be assessed with angiographic and electrocardiographic measurements (TIMI frame count, TIMI flow grade, Blush score, ST-T segment measurements). Early and late left ventricular function and infarct size will be measured with serial MRI imaging.