title: QRS normalization by ventricular fusion simulating tachycardia dependent left bundle branch block.
abstract: We report an example of ventricular fusion of a sinus impulse conducted with bundle branch block with an ectopic impulse arising on the ipsilateral side of the blocked bundle branch. The manifestation simulates the normalization which occurs during the relatively slow phase of a tachycardia dependent left bundle branch block.
mesh_terms: D000368:Aged; D002037:Bundle-Branch Block / Q000503:physiopathology*; D004562:Electrocardiography; D006801:Humans; D008297:Male; D013610:Tachycardia / Q000503:physiopathology*