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目的：分析急性前壁心肌梗塞患者心电图出现侧壁或下壁ＳＴ段压低的意义。方法：对４９例首次发病的急性前壁心肌梗塞患者的心电图与冠状动脉（冠脉）造影结果对比分析。结果：合并侧壁和下壁ＳＴ段压低者，特别是侧壁导联ＳＴ段压低者，其冠脉前降支近端多存在显著狭窄，Ｐ值分别＜０．０５和＜０．０１；在下壁或（和）侧壁导联ＳＴ段压低者中，冠脉往往有多支存在病变。结论：前壁心肌梗塞患者的心电图出现侧壁和下壁ＳＴ段压低预示心肌缺血范围的扩展
OBJECTIVE: To analyze the significance of ST-segment depression in the side wall or inferior wall of ECG in patients with acute anterior myocardial infarction. Methods: The electrocardiogram and coronary angiography results of 49 patients with first-time acute anterior myocardial infarction were compared and analyzed. Results: There was significant stenosis at the proximal anterior descending coronary artery (P <0.05 and <0.01, respectively) in patients with ST-segment depression, especially ST-segment depression of the lateral leads. In the lower wall or (and) the ST-segment depression in the lead, the coronary arteries often have multiple branches of the lesion. CONCLUSIONS: ST segment depression in the anterior and posterior walls of ECG in patients with anterior myocardial infarction predicts an expansion of myocardial ischemia