All patients receive standard of care therapy according to institutional guidelines, namely treatment with 250 mg aspirin intravenously, 600 mg clopidogrel orally and 5000 IU unfractioned heparin intravenously before PCI. The choice of balloons, stent types and PCI procedure as well as the use of glycoprotein IIb/IIIa inhibitors are left to the discretion of the attending physician.