Patients who is scheduled elective PCI are randomized to pitavastatin 4mg daily or without pitavastatin for 5 -7days before the procedure. Creatine kinase-MB, troponin I, and myoglobin levels are measured at baseline and at 8 and 24 hours after the procedure(1st evaluation). After PCI, pitavastatin will be administered for additional 4 weeks(2nd evaluation).