Document Detail

Amiodarone: risk factors for recurrence of symptomatic ventricular tachycardia identified at electrophysiologic study.
MedLine Citation:
PMID:  3928727     Owner:  NLM     Status:  MEDLINE    
Ventricular tachycardia induced by programmed electrical stimulation during amiodarone therapy often does not preclude a good clinical response. The purpose of this study was to determine whether use of discriminant analysis could distinguish patients who remained asymptomatic from those who subsequently developed symptomatic ventricular tachycardia or cardiac arrest. Studies were performed in 37 patients with sustained ventricular tachycardia who still had ventricular tachycardia induced during programmed electrical stimulation during amiodarone therapy. The mean follow-up time was 14.1 +/- 1.3 months (+/- SEM). Twenty-three patients remained asymptomatic, whereas 14 patients had symptomatic recurrence of their ventricular tachycardia. In patients with recurrence of arrhythmia compared with asymptomatic patients, administration of amiodarone caused a longer ventricular effective refractory period (296 +/- 8 versus 271 +/- 7 ms, p less than 0.05) and a greater change in corrected QT [QTc] interval (90 +/- 18 versus 44 +/- 9 ms, p less than 0.02), but no difference in the decrease in premature ventricular complexes after treatment with amiodarone. During amiodarone therapy, nonbundle branch reentrant repetitive ventricular responses were induced by a single ventricular extrastimulus during sinus rhythm in 9 of 14 patients with recurrent arrhythmias compared with 2 of 21 asymptomatic patients (p = 0.001). Also, less aggressive pacing techniques were required to induce ventricular tachycardia in 9 of 14 symptomatic patients compared with 4 of 23 asymptomatic patients (p less than 0.02).(ABSTRACT TRUNCATED AT 250 WORDS)
G V Naccarelli; N S Fineberg; D P Zipes; J J Heger; G Duncan; E N Prystowsky
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of the American College of Cardiology     Volume:  6     ISSN:  0735-1097     ISO Abbreviation:  J. Am. Coll. Cardiol.     Publication Date:  1985 Oct 
Date Detail:
Created Date:  1985-10-24     Completed Date:  1985-10-24     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8301365     Medline TA:  J Am Coll Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  814-21     Citation Subset:  AIM; IM    
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MeSH Terms
Amiodarone / therapeutic use*
Benzofurans / therapeutic use*
Long-Term Care
Middle Aged
Tachycardia / drug therapy*,  physiopathology
Grant Support
Reg. No./Substance:
0/Benzofurans; 1951-25-3/Amiodarone

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