Be of aspirin or clopidogrel allergy or intolerance are; the illness history of stroke or visceral hemorrhage within six months; serious liver disease and (or) coagulation abnormality; with antiplatelet treatment contraindications or recently proposed surgical person; valvular heart disease, cardiomyopathy, myocarditis, congenital heart disease, peripheral vascular disease, infection endocarditis; late kidney function not whole, tumor and chronic heart failure seriously affect the short-term prognosis of disease.Patients unable to complete follow-up.