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本文对８０例急性下壁心肌梗塞和３８例同时合并后侧壁心肌梗塞的心电图改变进行了对比分析，结果表明急性下壁心肌梗塞合并后侧壁梗塞患者胸前导联ＳＴ段较无后侧壁梗塞组下降明显，且与下壁导联ＳＴ段改变呈负相关（ｒ＝－０．７７２，Ｐ＜０．０１）。胸前导联ＳＴ段下降在合并后侧壁梗塞诊断中的敏感性为７３．７％，特异性为７５．０％，从而提示急性下壁心肌梗塞时如果有胸前导联ＳＴ段压低应注意是否合并后侧壁梗塞。另外，本组研究还表明左前降支和左旋支病变在急性下壁心肌梗塞合并后侧壁梗塞胸前导联ＳＴ段压低的发生中不起重要作用。
In this paper, 80 cases of acute inferior myocardial infarction and 38 cases of simultaneous posterior wall myocardial infarction electrocardiogram changes were compared, the results showed that acute inferior myocardial infarction with lateral infarction chest thoracic lead ST segment compared with no posterior The wall infarction group decreased significantly, and was negatively correlated with ST segment changes of inferior leads (r = -0.772, P <0.01). The ST-segment depression of the chest leads has a sensitivity of 73.7% and a specificity of 75.0% in the diagnosis of combined infarct wall, suggesting that if there is ST-segment depression in the anterior chest lead in acute inferior myocardial infarction Note whether the merger of the posterior wall infarction. In addition, this study also showed that left anterior descending and left circumflex artery lesions in the acute inferior myocardial infarction with chest wall lead ST segment depression does not play an important role.