Efficacy of External CounterPulsation for Postoperative Coronary Artery Bypass Grafting Patients

Inclusion Criteria: * Patients underwent coronary artery bypass grafting surgery Exclusion Criteria: * Cerebral hemorrhage within six months; * Obvious aortic insufficiency; * Aortic aneurysm; * Aortic dissection; * Coronary fistula or severe coronary aneurysm; * Symptomatic Congestive heart failure * New York Heart Association（NYHA）heart function class IV * Valvular heart disease; * Congenital heart diseases; * Cardiomyopathies * Uncontrolled hypertension, defined as SBP≥180mmHg or DBP≥110mmHg; * Lower limb infection; * Deep venous thrombosis; * Progressive malignancies