This study aims to investigate and evaluate clinical performance and quality measures for adults with acute ST-elevation myocardial infarction (STEMI) in China. Further more, the investigates like to develop quality improvement strategies and relevant tools focusing on treatment and clinical outcome in patients with STEMI. This is a annually survey , through consecutively recruiting all eligible inpatients and collecting relevant medical information, the performance of all participating hospitals. Further, quality improvement strategies including summary of clinical performance and quality measures, clinical pathways and team building will be organized for the purpose of quality improvement. All hospitals will consecutively recruit qualified patients in the same method adopted in baseline period. Then the reperfusion rates and other performance measures will be compared annually.