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近年,对左前分支阻滞(LAFB)的心电图诊断提出了两种标准:1.平均额面QRS电轴(AQRS)明显左偏;2.心室内区域性传导延迟,即aVL(探查心室高侧壁的导联)的本位曲折(ID)达50毫秒或更长,aVL的ID较V_6(探查心室的低位游离壁之导联)长10毫秒以上。本文旨在评价上述标准在诊断LAFB中的意义。
In recent years, two criteria have been proposed for electrocardiographic diagnosis of left anterior branch block (LAFB): 1. The mean frontal QRS axis (AQRS) is significantly left-handed; 2. The ventricular regional conduction delay, aVL The leading edge of the wall has an ID of 50 milliseconds or longer and the ID of the aVL is longer than 10 milliseconds longer than V_6 (the lead of the lower free wall probing the ventricle). This article aims to evaluate the significance of these criteria in the diagnosis of LAFB.