Europace Advance Access originally published online on December 4, 2008
Europace 2009 11(2):200-205; doi:10.1093/europace/eun328
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Leads and Lead Extraction
Long-term results of high vs. normal impedance ventricular leads on actual (Real-Life) pacemaker generator longevity
1 Clinical Department of Cardiology Medical University Innsbruck Anichstrasse 35 A – 6020 Innsbruck, Austria; 2 Department of Cardiac Surgery, University Hospital Innsbruck, Leopold-Franzens-University Innsbruck, Innsbruck, Austria; 3 Department of Internal Medicine, Landesklinikum Mödling, Mödling, Austria
Aim: The long-term effects of high impedance vs. standard impedance pacing leads on actual generator longevity were studied.
Methods and results: In 40 patients (21 females, age 73 ± 13 years) with standard dual-chamber pacemaker indication, bipolar standard impedance ventricular leads and high-impedance leads were implanted in a randomized fashion. Identical pacemaker generators and atrial pacing leads were implanted in all patients. Patients were observed during a mean follow-up of 89.8 ± 8.8 months before pacemaker replacement. Initially, the patients who received the high-impedance leads had a lower current drain as compared with standard pacing impedance leads, and the estimated pacemaker longevity was significantly prolonged, too. But this pattern disappeared after 6 years of follow-up, and finally the actual pacemaker generators’ replacement time was 86.7 ± 6.8 months in standard impedance lead group vs. 91.2 ± 10.3 months in high-impedance lead group (P = 0.17).
Conclusion: Implantation of high pacing impedance leads for ventricular stimulation does not result in a benefit with respect to pacemaker longevity as compared with standard impedance leads.
Key Words: Pacemaker generator longevity, Ventricular lead, High impedance, Current drain, Pacemaker follow-up, Effective replacement time
* Corresponding author. Tel: +43 512 5048 1306, Fax: +43 512 5042 3264, Email: ekt_guli{at}yahoo.com
Manuscript submitted 8 September 2008. Accepted after revision 7 November 2008.
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Related articles in Europace:
- Leads and longevity: how long will your pacemaker last?
- Richard K. Shepard and Kenneth A. Ellenbogen
Europace 2009 11: 142-143.[Full Text]
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  R. K. Shepard and K. A. Ellenbogen Leads and longevity: how long will your pacemaker last? Europace, February 1, 2009; 11(2): 142 - 143. [Full Text] [PDF]
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