His bundle recordings in right bundle-branch block coexisting with iatrogenic right ventricular pre-excitation

Right ventricular hypertrophy and right bundle branch block.

Wit/i the collaboration of Charles A. Bertrand, M.D., and Frederick R. Mugler, M.D. Electrocardiographic and vectorcardiographic studies on normal subjects and patients with heart disease suggest that criteria for the diagnosis of right ventricular hypertrophy can be improved and simplified. This report proposes new criteria for the electrocardiographic diagnosis of right ventricular hypertroph...

Incomplete Right Bundle-Branch Block

Incomplete right bundle-branch block (IRBBB) usually is thought to be associated with abnormalities of the peripheral Purkinje system. This paper discusses the results of a study of six dogs from the same family and three nonrelated dogs with congenital IRBBB. Cardiac catheterization data were normal, and no evidence or history of cardiac disease was found before or after death. The depolarizat...

The Association of Type B Ventricular Pre-excitation and Right Bundle-branch Block.

Contribution of His bundle recordings to analysis of abnormal beats with right bundle-branch block--superior axis pattern.

His bundle electrograms were recorded in four patients with ectopic rhythms showing a right bundle-branch block superior axis pattern. In one case what appeared to be a slow idioventricular rhythm was identified as a His bundle rhythm with transient right bundle-branch block and left anterior hemiblock. The second patient had an idioventricular tachycardia. H deflections were not seen in front ...

Ventricular excitation in experimental bundle-branch block.

Multipoint 1 recording apparatus has been used to study the pattern of ventricular excitation in experimental bundle-branch block. After block, the wave of activation spreads uniformly from the contralateral ventricle across the septum to the free wall of the homolateral ventricle. Septal activation consumes more time than in the normal. Changes occur in the site and extent of early endocardia!...