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目的:探讨体表心电图在预测急性心肌梗死(AMI)左前降支病变部位的价值。方法:分析47例梗死相关动脉为左前降支的AMI患者梗死部位与体表心电图的关系。结果:I、aVL、aVR导联ST抬高及Ⅲ导联ST降低在预测AMI左前降支病变部位的价值各不相同,aVL导联ST抬高的敏感性最高,aVR导联ST抬高的特异性最强,但各组间差异无统计学意义。进行Logistic回归分析后,只有aVL导联ST抬高与左前降支近端病变有相关性,其优势比(OR值)为5.778。结论:I、aVL、aVR导联ST抬高及Ⅲ导联ST抬高是预测AMI中左前降支病变部位的较好指标,但以aVL导联ST抬高最好。
Objective: To investigate the value of surface electrocardiogram (ECG) in predicting the location of left anterior descending coronary artery in acute myocardial infarction (AMI). Methods: The relationship between the infarct site and the body surface electrocardiogram in 47 AMI patients with infarct-related artery and left anterior descending artery was analyzed. Results: The values of ST elevation in I, aVL, aVR lead and ST lead reduction in lead Ⅲ were different in predicting the location of left anterior descending coronary artery disease. The sensitivity of ST elevation in aVL lead was the highest, ST elevation in aVR lead The strongest specificity, but no significant difference between the groups. Logistic regression analysis showed that only ST elevation in aVL leads correlated with proximal lesion of left anterior descending artery, and the odds ratio (OR) was 5.778. Conclusion: ST elevation of lead a, aVL and aVR leads and ST elevation of lead Ⅲ are better predictors of lesion site of left anterior descending artery in AMI, but ST elevation in lead aVL is the best.