title: Transient right bundle branch block during His bundle electrogram in a case with ventricular parasystole.
abstract: A case with ventricular parasystole and transient right bundle branch block during His bundle electrogram is reported. Although on surface electrocardiogram no preexisting atrioventricular (A--V) conduction disturbances could be noted, His bundle electrogram showed latent infrahisian conduction changes. This suggests a susceptibility for induced right bundle branch block during right heart catheterization and may take part in the mechanism of the ventricular ectopic activity of the patient.
mesh_terms: D000328:Adult; D001145:Arrhythmias, Cardiac / Q000150:complications* / Q000175:diagnosis; D002036:Bundle of His; D002037:Bundle-Branch Block / Q000150:complications* / Q000175:diagnosis; D004562:Electrocardiography / Q000379:methods; D006352:Heart Ventricles; D006801:Humans; D008297:Male