心脏缺血是由于部分冠状动脉(简称冠脉)阻塞,冠脉血液供应减少所致的心肌损害,它可以在相当长的一段时间内无症状,但可以产生心电图S—T段压低表现。随着病情的发展,约25—30％患者可能发生典型心绞痛或急性心肌梗塞,而大约70％的患者仍表现为无症状心肌缺血发作。由于心脏缺血在中老年人中患病率高,故而中年以上者应每年至少查一次心电图,以便早期发现,早期处理。一旦明确心脏缺血, Cardiac ischemia is due to partial coronary artery (referred to as coronary) obstruction, myocardial damage caused by reduced coronary blood supply, it can be asymptomatic for a long period of time, but can produce ECG S-T segment depression performance. As the disease progresses, about 25-30% of patients may develop typical angina or acute myocardial infarction, while about 70% of patients still show asymptomatic myocardial ischemic attack. Because of the high prevalence of heart ischemia in the middle-aged and elderly, middle-aged people should be at least once a year to check the ECG for early detection and early treatment. Once a clear heart ischemia,