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诊断下壁心肌梗塞(简称下壁心梗)常重视心电图Ⅱ、Ⅲ、aVF导联出现的病理性Q波,但ORS波群的起始及终末部分的改变却少被人们所注意。作者曾收治3例临床确诊下壁心梗患者,在早期病理性Q波尚未典型出现前,其QRS的起始及终末部分已有改变。现分析如下。一、3例确诊下壁心梗患者早期心电图异常表现:Ⅱ、Ⅲ、aVF的ORS总时间均比导联Ⅰ增宽;Ⅱ、Ⅲ、aVF的R波顶点至终末所占时间也较导联Ⅰ为宽;R_Ⅲ>R_Ⅱ;Q_Ⅱ>Q_Ⅲ。二、有关下壁心梗Ⅱ、Ⅲ、aVF导联ORS终末除极延缓的改变,Warner等(1985)用三通道心电图机及向量图同时记录一组下壁心梗患者,见有QRS终末
Diagnosis of inferior wall myocardial infarction (referred to as the inferior myocardial infarction) often attach importance to pathological Q wave ECG Ⅱ, Ⅲ, aVF lead appears, but the beginning and end of the ORS wave group changes are seldom noticed. The author has admitted to 3 cases of clinically diagnosed patients with inferior myocardial infarction, in the early pathological Q waves have not yet appeared before the beginning and the end of the QRS has been changed. Analysis is as follows. First, in 3 patients with inferior myocardial infarction diagnosed early ECG abnormalities: Ⅱ, Ⅲ, aVF ORS total time longer than lead Ⅰ; Ⅱ, Ⅲ, aVF R wave apex to terminal time than the guide Union Ⅰ is wide; R_Ⅲ> R_Ⅱ; Q_Ⅱ> Q_Ⅲ. Second, the lower wall myocardial infarction Ⅱ, Ⅲ, aVF lead ORS terminal depolarization and delaying changes, Warner et al (1985) with three-channel ECG and vector images simultaneously recorded a group of patients with inferior myocardial infarction, see QRS terminal end