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目的分析左主干病变冠心病心绞痛患者的心电图改变。方法30例冠脉造影诊断为左主干病变的患者,对其心绞痛发作时各导联ST段的变化及临床资料进行分析。结果30例中除7例急性心肌梗死患者呈现典型心电图演变外,有20例患者ST段广泛压低(5个导联以上)。17例患者胸痛发作的心电图中可见STaVR抬高,其中13例STV1也可见抬高,但是程度均低于aVR导联。结论左主干病变引起心肌缺血的心电图改变表现为广泛导联ST段压低及aVR导联ST段抬高。
Objective To analyze the changes of electrocardiogram in patients with left main coronary artery disease and angina pectoris. Methods Thirty patients with left main coronary artery disease diagnosed by coronary angiography were involved in the analysis of ST segment changes and clinical data. Results Thirty patients showed ST-segment depression (5 leads or more) in 20 patients except for 7 patients with typical acute myocardial infarction. STaVR elevation was seen in the electrocardiogram of chest pain in 17 patients, of which 13 were also elevated in STV1, but to a lesser extent than in aVR. Conclusions The changes of ECG in left main coronary artery caused by myocardial ischemia show the decrease of ST segment and the elevation of ST segment in aVR lead.