Effect of Remote Ischemic Perconditioning on Acute Kidney Injury in Adult Valve Replace

Inclusion Criteria: * rheumatic heart valve disease requiring selective aortic or double valve(aortic and mitral valve) replacement Exclusion Criteria: * infective endocarditis congenital valve disease previous cardiac surgery complicated with rereplace valve * Renal dysfunction * diabetes * coronary artery disease * hypertension * peripheral vascular disease affecting the lower limb free of arteriovenous fistula * receiving aspirin, corticosteroids, angiotensin-converting enzyme inhibitors or statin perioperatively