title: Complicated Holter tracing with an incidence of inappropriate mode switch due to sensing abnormalities in a patient with dual-chamber pacemaker.
abstract: 24-hour Holter monitoring of a 59 year-old man with DDDR pacemaker (programmed mode: DDD) implanted for sick sinus syndrome with paroxysmal atrial fibrillation was performed one month after implantation, due to palpitations. Several episodes of rapid pacing of decreasing rate were detected. Intracardiac recording stored in the pacemaker memory had shown episodes of atrial lead oversensing, which led to the mode switch, resulting in DDIR mode. Signals which caused oversensing were not seen in Holter tracing.
authors.affiliation: Department of Pathophysiology, Wroclaw Medical University, Wroclaw, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Poręba
authors.forename: Stefan
authors.initials: S
authors.lastname: Karczmarewicz
authors.forename: Bartłomiej
authors.initials: B
authors.lastname: Szwarc
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Sobieszczańska
authors.forename: Jerzy Krzysztof
authors.initials: JK
authors.lastname: Wranicz
mesh_terms: D001281:Atrial Fibrillation / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy*; D002304:Cardiac Pacing, Artificial; D015716:Electrocardiography, Ambulatory; D004867:Equipment Design; D004868:Equipment Failure; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D012804:Sick Sinus Syndrome / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy*