There were no significant differences between the groups in smoking status, hypertension, uric acid, LDL-C, angiotensin converting enzyme inhibitors (ACEI), diuretic, ezetimibe, aspirin, type and volume of CM, history of myocardial infarction and cardiac surgery, type of operation, multi vessel PCI and total length of stents. The gene discussed is ACE; the disease is myocardial infarction.