Abstract: The 20 years data from 2 792 cases of acute myocardial infarction(AMI)were divided into 4 groups in every five years, and the morbidity, mortality and prognosis were compared. The results showed, during the last 15 years, the total case numbers admitted to hospital were increased gradually for every five-year period. During the recent 10 years, the aged cases increased significantly, and the case number complicated with heart failure rose up and that with arrhythmias went down obviously. For constitute ratio of death, there was a trend that aged cases and reinfarction increased steadily. Most deaths resulted from heart failure,ventricular fibrillation or cardiac shock, the main death cause was heart failure especially for aged AMI. Therefor, It is the key measure for AMI cases to be hospitalized to prevent from heart failure.

Key words: acute myocardial infarction, complication, mortality, constitute ratio