Journal Article

Retrospective analysis of mode survival, reliability of atrial sensing and incidence of atrial tachyarrhythmias in 307 single-lead VDD pacemaker patients

Igor Zupan, Luka Lipar, David Žižek, Wim Boute, Maša Vidmar, Tone Gabrijelčič, Peter Rakovec and Aleš Brecelj

in EP Europace

Published on behalf of European Heart Rhythm Association of the European Society of Cardiology (ESC)

Volume 8, issue 10, pages 855-858
Published in print October 2006 | ISSN: 1099-5129
Published online August 2006 | e-ISSN: 1532-2092 | DOI: http://dx.doi.org/10.1093/europace/eul091
Retrospective analysis of mode survival, reliability of atrial sensing and incidence of atrial tachyarrhythmias in 307 single-lead VDD pacemaker patients

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Aims The aim of this retrospective analysis was to investigate VDD mode survival, development of atrial tachyarrhythmias (AT), and long-term atrial sensing performance of VDD pacing systems.

Methods and results We implanted single-lead VDD pacemakers in patients with isolated atrioventricular block and performed a retrospective analysis of 307 patients who had their devices implanted between May 1994 and September 2001. In 39 patients (12.7%), the pacing mode had to be reprogrammed to a single-chamber ventricular pacing mode, mostly due to permanent AT. In 16 of these patients, the atrial sensing safety margin was less than 150%. The atrial sensing safety margin was insufficient, i.e. less than 100% in only seven patients. Although only 12 (3.9%) of the patients had a history of paroxysmal AT at the time of pacemaker implantation, 200 (65%) patients presented with AT during follow-up. The mean AT burden at the last follow-up was 2.5%.

Conclusion These data illustrate that single-lead VDD pacemakers can be applied without serious complications in a highly selected group of patients. Our main concern is the development of AT in a large part of our population. Over a 10-year period, two thirds of our patients presented with AT.

Keywords: Single-lead VDD pacemaker; Long-term follow-up; Atrial tachyarrhythmia; Mode survival; Retrospective analysis

Journal Article.  2436 words.  Illustrated.

Subjects: Cardiovascular Medicine

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