Quality Measurement and Improvement Study of Surgical Coronary Revascularization: Secondary Prevention

The investigators have identified underuse of secondary prevention medications at discharge of patients underwent coronary artery bypass grafting (CABG) in China. The aim of this study is to develop series of quality improvement strategies focusing on secondary prevention medications for patients underwent CABG, and to evaluate their effectiveness and safety via a hospital-level cluster randomized clinical trial. The investigators established a network of 60 hospitals which have participated into Chinese Cardiovascular Surgery Registry and submitted 50 or more CABG surgeries already. The participating sites will be divided into intervention and control groups in a 1:1 ratio. The intervention group will undertake intervention of quality improvement strategies, while the control group will maintain the routine practice pattern. All hospitals will consecutively enroll and submit data of CABG during the enrollment period, estimated for 6 months. The prescribing rates of angiotensin converting enzyme inhibitor (ACEI), angiotensin receptor blocker (ARB), beta-blockers, statins and aspirins will be compared between 2 groups.