title: ECG quiz. What is causing the finding: the pacemaker, patient or the ECG machine?
authors.forename: Viet
authors.initials: V
authors.lastname: Tran
authors.forename: Tracy
authors.initials: T
authors.lastname: Holt
authors.forename: Yochai
authors.initials: Y
authors.lastname: Birnbaum
mesh_terms: D000369:Aged, 80 and over; D018880:Atrial Premature Complexes / Q000175:diagnosis* / Q000503:physiopathology; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D005260:Female; D006801:Humans; D010138:Pacemaker, Artificial; D012804:Sick Sinus Syndrome / Q000628:therapy*