急性心肌梗死(AMI)是冠心病最严重的一种类型,发病急,预后差。在大多数情况下常有典型心电图(ECG)改变。体表心电图迄今仍是AMI的最常用的诊断方法,具有无创、简单、费用低、可重复等优点,短时间内即可做出诊断,与临床资料相结合进行分析,可对70%～80%的AMI做出早期诊断。近年 Acute myocardial infarction (AMI) is the most serious type of coronary heart disease, acute onset, poor prognosis. In most cases, typical ECG changes are common. Surface ECG so far is still the most commonly used AMI diagnostic methods, with non-invasive, simple, low cost, repeatable, etc., can make a diagnosis within a short period of time, combined with clinical data analysis can be 70% to 80 % AMI make early diagnosis. in recent years