| The impact of automatic threshold tracking on pulse generator longevity in patients with different chronic stimulation thresholds. | |
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MedLine Citation:
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PMID: 11139924 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Automatic adjustment of the stimulation output of pacemakers to changing stimulation thresholds using the Autocapture feature increases patient safety and decreases energy consumption. This study examined the impact of Autocapture on pulse generator longevity in patients with different chronic stimulation thresholds. Eighty patients (mean age 79 +/- 9 years; 37 men, 43 women) with Pacesetter Regency SR+ pacemakers were included in the study. Data were collected before discharge of the patients from the hospital, 6-12 weeks postimplant, and then every 6-12 months. Pulse generator longevity was calculated theoretically, assuming 100% stimulation with a stable threshold, at a pacing rate of 65 +/- 6 beats/min and 1% backup pulses. Theoretical pulse generator longevity was calculated for low (< 1 V), intermediate (> or = 1 V and < 2 V), and high (> or = 2 V) stimulation thresholds. Pulse generator longevity was compared among three groups: (A) Autocapture programmed On, (B) Autocapture programmed Off, (C) theoretical calculations using thresholds of patients in group A with the stimulation voltage programmed at twice pacing threshold, or at a minimum of 2.4 V. The mean follow-up time since implantation was 19 +/- 8 months. The calculated longevity benefits for patients in group A were 36%, 59%, and 30% compared to group B, and 19%, 32%, and 49% compared to group C in patients with low, intermediate, and high chronic stimulation thresholds, respectively. Theoretical calculations based on chronic stimulation thresholds in our patient population with Regency SR+ pacemakers suggest that Autocapture may markedly prolong pulse generator longevity in patients with a broad range of long-term pacing thresholds. |
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Authors:
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L Simeon; F Duru; M Fluri; H R Jenzer; M Rahn; R Candinas |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Pacing and clinical electrophysiology : PACE Volume: 23 ISSN: 0147-8389 ISO Abbreviation: Pacing Clin Electrophysiol Publication Date: 2000 Nov |
Date Detail:
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Created Date: 2001-01-03 Completed Date: 2001-02-22 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7803944 Medline TA: Pacing Clin Electrophysiol Country: United States |
Other Details:
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Languages: eng Pagination: 1788-91 Citation Subset: IM |
Affiliation:
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Cardiac Arrhythmia Unit, University Hospital of Zurich, Rämistr. 100, Zurich, CH-8091 Switzerland. irat.duru@dim.usz.ch |
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Arrhythmias, Cardiac / therapy* Chronic Disease Electric Power Supplies / statistics & numerical data Electric Stimulation / instrumentation, methods Electrophysiologic Techniques, Cardiac / statistics & numerical data Equipment Design / statistics & numerical data Female Humans Male Pacemaker, Artificial / statistics & numerical data* Retrospective Studies Sensory Thresholds* Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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