Document Detail

Annual distribution of ventricular tachycardias and ventricular fibrillation.
MedLine Citation:
PMID:  14660999     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Ischemic events and coronary deaths show seasonal variability with a peak during December and January. It remains unclear whether ventricular tachycardias (VT) and ventricular fibrillation (VF) follow a similar pattern. The purpose of this study was to investigate the annual distribution of malignant ventricular arrhythmias. METHODS: Over a period of 11 years, all appropriate shock episodes (SE) after VT and VF in patients with an implantable cardioverter defibrillator (lCD) were analyzed with respect to the month of occurrence. An appropriate SE was defined as out-of-hospital VT/VF terminated by lCD shocks. Multiple shocks within 1 week were defined as 1 SE. RESULTS: Two hundred and thirty-three of 308 patients with an lCD had appropriate SE during follow-up. In these patients the seasonal variation of 753 SE was calculated. Most SE occurred during January (93 SE), and the fewest SE occurred during June (39 SE). The seasonal pattern was statistically significant with a peak during winter (P =.001). The seasonal pattern did not differ between patients with an ischemic and those with a nonischemic underlying cardiac disease. CONCLUSION: Appropriate shock episodes due to out-of-hospital VT/VF in patients with an lCD show seasonal variation with a significant peak during winter. The pattern is similar in patients with ischemic and nonischemic cardiac disease.
Dirk Müller; Felix Lampe; Karl Wegscheider; Heinz-Peter Schultheiss; Steffen Behrens
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American heart journal     Volume:  146     ISSN:  1097-6744     ISO Abbreviation:  Am. Heart J.     Publication Date:  2003 Dec 
Date Detail:
Created Date:  2003-12-08     Completed Date:  2004-01-13     Revised Date:  2006-02-27    
Medline Journal Info:
Nlm Unique ID:  0370465     Medline TA:  Am Heart J     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1061-5     Citation Subset:  AIM; IM    
Department of Cardiology and Pulmonology, Klinikum Benjamin Franklin, Free University, Berlin, Germany.
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MeSH Terms
Circadian Rhythm
Coronary Disease / complications,  epidemiology
Death, Sudden, Cardiac / epidemiology
Defibrillators, Implantable / statistics & numerical data*
Electric Countershock / utilization*
Middle Aged
Retrospective Studies
Tachycardia, Ventricular / epidemiology*,  etiology,  therapy
Ventricular Fibrillation / epidemiology*,  etiology,  therapy
Comment In:
Am Heart J. 2003 Dec;146(6):941-3   [PMID:  14660982 ]

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