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下壁心肌梗塞(IMI)或纤维化及左前分支传导阻滞(LAFB)均为形成心电轴显著左偏的常见原因。但其形成机理不同,各自的心电图、心向量图表现亦异,鉴别上并无困难。下壁心肌梗塞合并左前分支阻滞时心电图难以诊断,心向量图检查有助于作出判断。不仅下壁心肌梗塞,其他原因引起的下壁心肌坏死、纤维化亦可合并左前分支阻滞。本文从心向量图、心电图分析下壁心肌梗塞或纤维化合并左前分支阻滞的诊断特点。本文收集经Frank导联心向量图及同日常规12导联心电图检查三组病例。第一组为下壁心肌梗塞或纤维化合并左前分支阻滞(IMI+LAFB组)共18
Lower wall myocardial infarction (IMI) or fibrosis and left anterior branch block (LAFB) are common causes of significant left-sided ECG axis. However, its formation mechanism is different from their respective ECG, cardiac vector map performance is also different, there is no difficulty in identification. Lower wall myocardial infarction with left anterior branch block ECG difficult to diagnose, cardiac vector chart examination helps to make judgments. Not only inferior myocardial infarction, other causes of myocardial necrosis of inferior wall, fibrosis can also be combined with left anterior branch block. This article from the heart vector diagram, ECG analysis of inferior wall myocardial infarction or fibrosis with left anterior branch block diagnostic features. This article collects Frank’s ventricular vector diagram and the same day routine 12-lead ECG three groups of cases. The first group was inferior myocardial infarction or fibrosis with left anterior branch block (IMI + LAFB group) a total of 18