Gap in bundle-branch conduction elicited by programmed his bundle stimulation

His Bundle electrogram in bundle-branch block.

SUMMARY Because a great majority of patients with chronic complete heart block have bilateral bundle-branch lesions, it becomes important to recognize earlier degrees of bilateral bundle-branch block. The H-V interval in the His bundle electrogram during unilateral bundle-branch block reflects the conduction primarily through the contralateral bundle branch, and thus the His bundle electrogram ...

Longitudinal dissociation in the His bundle. Bundle branch block due to asynchronous conduction within the His bundle in man.

RIGHT BUNDLE BRANCH PURKlNJE Flf 3 ERS F BUNDLE OF HIS I LEFT BUNDLE BRANCH MYOCARDIUM

A dom inant tenet in physio logy for m .ore t han half a century h as been the principle of homeostasis. The term was coined by W. B. Cannon (2) to describe the observation that physiological systems normally operate to reduce variability and to maintain a constancy of internal function. Accordingly, one might expect most any physiological variable, including heart rate, to return to its normal...

Conduction disturbances located within the His bundle.

SUMMARY Four patients are described with different degrees of conduction disturbance within the His bundle. In one patient with a Mobitz type II atrioventricular (A-V) block with normal QRS complexes the blocked atrial beats were followed by a His potential. Since the QRS complexes of the conducted beats were completely normal, the site of the block was thought to be in the distal part of the H...

Antegrade concealed conduction to the His bundle; documentation with His bundle recording.