本文研究首次心肌梗死(AMI)患者信号平均心电图(SAECG)晚电位的检出率与年龄、梗死部位、病变冠脉数、左室射血分数(EF)、采用的治疗方法、梗死相关血管是否再通、入院至SAECG检查的时间、入院至冠脉造影(CA) In this study, the detection rate and the age, infarct size, the number of diseased coronary arteries, left ventricular ejection fraction (EF), the method of treatment and the infarction-related blood vessels in patients with AMI were analyzed Recanalization, admission to SAECG examination time, admission to coronary angiography (CA)