1引言静息心电图(ECG)是最早用于诊断冠心病心肌梗死和冠状动脉供血不足的检查方法[1,2],至今仍广泛应用于临床实践中,并在诊断冠状动脉病变、判断心肌缺血部位及评估预后方面有重要作用[3]。2ECG诊断心肌缺血的基本原理及常见表现ECG中正常QRS波群是心室除极时各部位电量作用? 1 Introduction Resting electrocardiogram (ECG) is the earliest used to diagnose coronary heart disease myocardial infarction and coronary insufficiency [1,2], is still widely used in clinical practice, and in the diagnosis of coronary artery disease, to determine myocardial ischemia Blood location and prognosis evaluation has an important role [3]. 2ECG diagnosis of myocardial ischemia and the basic performance of the common ECG normal QRS complex is the role of various parts of the ventricular depolarization power?