Observations on the Electrocardiogram and Ventricular Gradient in Complete Left Bundle Branch Block

Electrocardiograms from 109 patients with left bundle branch block were divided into four major groups depending on differences in standard and unipolar precordial leads. These records were then studied to find if one can draw any conclusions relative to ventricular hypertrophy or myocardial infarction in the presence of left branch block. In addition, the ventricular gradient was estimated in twenty-three instances and its value discussed.