title: Why does the QRS morphology of the paced beat change in patients with biventricular cardiac pacing systems?
authors: University of California San Francisco, 505 Parnassus Avenue, San Francisco, CA 94341-0210, USA.
authors: Christine
authors: C
authors: Thompson
authors: Angela
authors: A
authors: Tsiperfal
mesh_terms: D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D006329:Heart Conduction System / Q000473:pathology; D006333:Heart Failure / Q000150:complications / Q000503:physiopathology / Q000628:therapy; D006801:Humans; D008297:Male; D013318:Stroke Volume / Q000502:physiology; D018487:Ventricular Dysfunction, Left / Q000150:complications / Q000503:physiopathology / Q000628:therapy