Document Detail


Heart rate dynamics at the onset of ventricular tachyarrhythmias as retrieved from implantable cardioverter-defibrillators in patients with coronary artery disease.
MedLine Citation:
PMID:  10821817     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: The recent availability of implantable cardioverter-defibrillators (ICDs) that record 1024 R-R intervals preceding a ventricular tachyarrhythmia (VTA) provides a unique opportunity to analyze heart rate variability (HRV) before the onset of VTA. METHODS AND RESULTS: Fifty-eight post-myocardial infarction patients with an implanted ICD for recurrent VTA provided 2 sets of 98 heart rate recordings in sinus rhythm: (1) before a VTA and (2) during control conditions. Three subgroups were considered according to the antiarrhythmic (AA) drug regimen. A state of sympathoexcitation was suggested by the significant reduction in HRV before VTA onset compared with control conditions. beta-Blockers and dl-sotalol enhanced HRV in control recordings; nevertheless, HRV declined before VTA independent of AA drugs. A gradual increase in heart rate and decrease in sinus arrhythmia at VTA onset were specific findings of patients who received dl-sotalol. CONCLUSIONS: The peculiar heart rate dynamics observed before VTA onset are suggestive of a state of sympathoexcitation that is independent of AA drugs.
Authors:
E Pruvot; G Thonet; J M Vesin; G van-Melle; K Seidl; H Schmidinger; J Brachmann; W Jung; E Hoffmann; R Tavernier; M Block; A Podczeck; M Fromer
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Publication Detail:
Type:  Comparative Study; Journal Article; Multicenter Study; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Circulation     Volume:  101     ISSN:  1524-4539     ISO Abbreviation:  Circulation     Publication Date:  2000 May 
Date Detail:
Created Date:  2000-06-21     Completed Date:  2000-06-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0147763     Medline TA:  Circulation     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2398-404     Citation Subset:  AIM; IM    
Affiliation:
Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland. etienne.pruvot@chuv.hospvd.ch
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MeSH Terms
Descriptor/Qualifier:
Adrenergic beta-Antagonists / therapeutic use
Aged
Anti-Arrhythmia Agents / therapeutic use
Coronary Disease / complications*
Defibrillators, Implantable*
Heart Rate* / drug effects
Humans
Middle Aged
Sotalol / therapeutic use
Tachycardia, Ventricular / drug therapy,  etiology,  physiopathology*,  therapy*
Chemical
Reg. No./Substance:
0/Adrenergic beta-Antagonists; 0/Anti-Arrhythmia Agents; 3930-20-9/Sotalol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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