| Non-physiological increase of AV conduction time in sinus disease patients programmed in AAIR-based pacing mode. | |
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MedLine Citation:
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PMID: 22836479 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE: The EVOCAV(DS) trial aimed to quantify the paradoxal atrioventricular (AV) conduction time lengthening in sinus node (SD) patients (pts) paced in AAIR-based pacing mode. METHODS: SD pts, implanted with dual-chamber pacemaker programmed in AAIR-based pacing mode, were randomized in two arms for a 1-month period: the low atrial pacing (LAP; basic rate at 60 bpm, dual sensor with minimal slope) and the high atrial pacing (HAP; basic rate at 70 bpm, dual sensor with optimized slope, overdrive pacing) arm. At 1 month, crossover was performed for an additional 1-month period. AV conduction time, AV block occurrence and AV conduction time adaptation during exercise were ascertained from device memories at each follow-up. RESULTS: Seventy-nine pts participated to the analysis (75 ± 8 years; 32 male; PR = 184 ± 38 ms; bundle branch block n = 12; AF history n = 36; antiarrhythmic treatment n = 53; beta-blockers n = 27; class III/Ic n = 18; both n = 8). The mean AV conduction time was significantly greater during the HAP (275 ± 51 ms) vs. LAP (263 ± 49 ms) period (p < 0.0001). Class III/Ic drugs were the only predictors of this abnormal behaviour. Degree II/III AV blocks occurred in 49 % of pts in the HAP vs. 19 % in the LAP period (p < 0.0001). Fifty-two patients (66 %) presented a lengthening of AV conduction time during exercise. CONCLUSION: AAIR-based pacing in SD pts may induce a significant lengthening of pts' AV conduction time, including frequent abnormal adaptation of AV conduction time during exercise. |
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Authors:
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Philippe Mabo; Jean-Pierre Cebron; Aude Solnon; Aude Tassin; Laurence Graindorge; Daniel Gras |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-7-27 |
Journal Detail:
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Title: Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing Volume: - ISSN: 1572-8595 ISO Abbreviation: - Publication Date: 2012 Jul |
Date Detail:
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Created Date: 2012-7-27 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9708966 Medline TA: J Interv Card Electrophysiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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CHU Rennes, Rennes, France, anne.rousseauplasse@sorin.com. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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