Incidence and site of atrioventricular block in patients with chronic bifascicular block.

Significance of chronic bifascicular block without apparent organic heart disease.

Eighty-six of 452 patients (19%) with chronic bifascicular block were found to have no clinically apparent associated organic heart disease (OHD) and were defined as having primary conduction disease (PCD). Comparison of patients with PCD and OHD revealed a significantly lower incidence of the following clinical variables in the PCD patients (p less than 0.001): exertional angina, dyspnea, cong...

Disopyramide induced second and third degree atrioventricular block in patients with bifascicular block. An acute stress test to predict atrioventricular block progression.

Syncopal attacks in patients with bifascicular block may be due to both ventricular tachyarrhythmias and intermittent atrioventricular block in addition to non-cardiac causes and lead to antiarrhythmic treatment with drugs or pacemaker or both. The acute electrophysiological effect of intravenous disopyramide 2 mg/kg body weight given over five minutes on the His-Purkinje system was assessed in...

Are there any useful investigations that predict which patients with bifascicular block will develop third degree atrioventricular block?

Significance of block distal to the His bundle induced by atrial pacing in patients with chronic bifascicular block.

Twenty-one of 496 (4%) patients with chronic bifascicular block, studied and followed prospectively, had block distal to the His bundle (BDH) induced by atrial pacing during initial electrophysiologic studies. In six, BDH was noted during pacing-induced atrioventricular (AV) nodal Wenckebach periods (at paced rates of 150--190 beats/min), with BDH in the short HH cycles after the AV nodal block...

Editorial: Prognosis of Patients with Chronic Bifascicular Block

OF ALL RECENT conceptual advances in electrocardiography, few, if any, are as popular as the concept of a trifascicular conduction system distal to the bifurcation of the His bundle.' The wide appeal of the trifascicular concept is understandable. The distinct morphological electrocardiographic patterns of various fascicular blocks are easily recognizable even to a nonexpert. The schematic diag...