title: A case of paroxysmal rate dependent intra-His bundle block.
abstract: We present a symptomatic bradycardia-dependent paroxysmal atrio-ventricular (A-V) block occurred within the bundle of His. Paroxysmal A-V block was caused by atrial or ventricular premature beats and also by sinus slowing. This case also showed tachycardia-dependent A-V block within the bundle of His. We also discussed the controversial mechanisms of paroxysmal A-V block.
mesh_terms: D002037:Bundle-Branch Block / Q000503:physiopathology*; D006327:Heart Block / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged