A Study of the Spatial Vectorcardiogram in Left Bundle Branch Block

Abstract

A method of vectorcardiography, in which the projections of the spatial vectorcardiogram in various planes of an equilateral tetrahedron reference system are recorded, has been applied to the study of left bundle branch block. Results suggest that the method employed may provide information relative to the state of the myocardium and the extent of myocardial lesions which is not evident from electrocardiographic examination.