Right bundle branch block and right ventricular hypertrophy: Electrocardiographic and vectorcardiographic diagnosis

Abstract The right intracavity leads show a great incidence of incomplete or complete right bundle branch block in cases with electrocardiograms very suggestive of right ventricular hypertrophy. In these instances we have found three different forms of rotation of the vectorcardiographic loop in the horizontal plane: clockwise, counterclockwise and mixed rotation. We believe that this is sufficient to state that there is no loop rotation which might be considered as exclusively representative of right bundle branch block.