Vectorcardiograms of right bundle-branch block with left axis deviation predominantly fall into two distinct patterns.
Analysis of the 23 vectorcardiograms revealed that the majority fell into two basic patterns, with the rest in a smaller intermediate category that showed mixed features or was otherwise unclassifiable. The characteristic distinguishing features of the two main types, type A and type B, were found in the TABLE I
SALTZMAN et al. (Thu,) studied this question.