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心电图判断左、右束支阻滞时主要根据V1导联QRS波终末向量的方向,其向上时为右束支阻滞,向下时为左束支阻滞。当束支阻滞的心电图典型时,其图形的特征显著,诊断也一目了然,图形不典型时,可使诊断出现困难。为便于心电图图形不典型的束支阻滞诊断,为便于理解和记忆,Mike Taigman提出了一种称为转向灯原理的方法(turn signal theory)。
Electrocardiogram to determine left and right bundle branch block mainly based on V1 lead QRS wave terminal vector direction, when it is up for the right bundle branch block, down when the left bundle branch block. When the bundle branch block ECG typical, the characteristics of its graphics significantly, the diagnosis is also clear at a glance, atypical patterns, the diagnosis can make it difficult. To facilitate the diagnosis of the bundle branch block, which is not typical of electrocardiogram patterns, Mike Taigman proposed a turn signal theory called the turn signal theory for easy understanding and memory.