Objective To identify the factors related to acute ST-segment elevation myocardial infarction (STEMI) with normal angiographic findings of the coronary artery. Methods An retrospective analysis of the electrocardiographic, echocardiographic, and angiographic data of 271 STEMI cases was conducted. Of these patients, 29 had normal coronary artery by angiography and from the rest patients presenting abnormal angiographic findings of the coronary artery, 60 were randomly selected to serve as the control group....