title: Intermittent variation in paced QRS morphology: what is the mechanism?
authors.affiliation: Department of Cardiac Electrophysiology, Emory University Hospital, 1364 Clifton Road NE, Atlanta, GA 30322, USA.
authors.forename: Mikhael
authors.initials: M
authors.lastname: El-Chami
authors.forename: Dale
authors.initials: D
authors.lastname: Yoo
authors.forename: Michael H
authors.initials: MH
authors.lastname: Hoskins
mesh_terms: D000368:Aged; D002037:Bundle-Branch Block / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000628:therapy*; D002304:Cardiac Pacing, Artificial; D002311:Cardiomyopathy, Dilated / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000628:therapy*; D054326:Coronary Sinus / Q000000981:diagnostic imaging / Q000503:physiopathology; D017147:Defibrillators, Implantable; D004868:Equipment Failure; D005260:Female; D006801:Humans; D011859:Radiography