在美国,每年约有50万人因患急性心肌梗塞(AMI)而住院,住院死亡率第一年约为10%,第二年为5%,以后每年约为3～4%。主要死亡危险是在住院后的6个月内,其中,1小时内猝死与非猝死几乎相等。作者将危险因素分为四大类:由心脏整体泵衰竭反映的心肌损害程度;由局部冠状动脉粥样硬化引起缺血所造成的可变性心肌 In the United States, about 500,000 people are hospitalized each year for suffering from acute myocardial infarction (AMI). In-hospital mortality is about 10% in the first year, 5% in the second year and about 3-4% in the future. The main risk of death is within 6 months of hospitalization, in which sudden death within one hour is almost equal to non-sudden death. The authors classify the risk factors into four broad categories: the extent of myocardial damage reflected by pump failure in the heart as a whole; variability caused by ischemia caused by local coronary atherosclerosis