The tracings of two patients with acute myocardial infarction showing complete right bundle branch block and alternating block in the divisions of the left branch are presented. Both developed a type II (Mobitz) block which was attributed to a simultaneous interruption of conduction in the three main intraventricular tracts (trifascicular block). Left divisional blocks produced specific changes...

BACKGROUND Interest in bundle-branch block has focused primarily on its role as a predictor of mortality and coexisting cardiovascular diseases. Previous studies of prevalence, correlation to cardiovascular disease, and mortality have produced conflicting results. METHODS AND RESULTS We studied a random-sampled population of 855 men who were 50 years old in 1963 and followed them up for 30 ye...

Background—Interest in bundle-branch block has focused primarily on its role as a predictor of mortality and coexisting cardiovascular diseases. Previous studies of prevalence, correlation to cardiovascular disease, and mortality have produced conflicting results. Methods and Results—We studied a random-sampled population of 855 men who were 50 years old in 1963 and followed them up for 30 year...

was common (49%), and evidence is produced which suggests that it is probably the result of the ventriculotomy rather than direct trauma to the right bundle. Right bundle-branch block with left anterior hemiblock was less common (II%). Right bundle-branch block with left anterior hemiblock, especially if associated with a prolonged PR interval (trifascicular block), may predispose to complete a...

This report describes tachyeardiaand bradycardia-dependent left bundle branch block in a patient who exhibited normal intraventricular conduction with impulses intermediate in timing. During bradyeardia, longer cycles were associated with increasing degrees of incomplete left bundle branch block. These clinical observations support the existence of slow Phase 4 depolarization of latent pacemake...

background: many factors influence the prognosis of patients with (chf), among these; more attention has been focused on the role of left bundle branch block (lbbb).  the present study was performed to find out the prevalence of chf in lbbb patients. methods: in this cross-sectional study, 246 were diagnosed consecutive patients with lbbb pattern in ecg during july 2004 until october 2006 at im...