Document Detail

Electrophysiologic effects of flecainide acetate on sinus node function, anomalous atrioventricular connections, and pacemaker thresholds.
MedLine Citation:
PMID:  6695817     Owner:  NLM     Status:  MEDLINE    
The acute electrophysiologic effects of i.v. flecainide acetate (2 mg/kg body weight) were assessed in 71 patients undergoing electrophysiologic study. Ten patients underwent investigation for sinus node dysfunction. Sinus cycle length shortened slightly, from 980 +/- 292 to 931 +/- 276 ms (p less than 0.01). Uncorrected or corrected sinus node recovery times or sinoatrial conduction time (according to the methods of Strauss and Narula) did not change in 6 patients with normal sinus node function and in 3 of 4 patients with abnormal sinus node function at rest. In the remaining patient maximal sinus node recovery time increased from a value at rest of 5,185 ms to 23,460 ms after flecainide. In the same patient sinoatrial conduction times at rest increased from 159 ms (Strauss method) and 143 ms (Narula method) to 1,398 and 1,455 ms, respectively, after flecainide. Thirty-three patients underwent electrophysiologic evaluation of anomalous atrioventricular (AV) pathways and reentrant tachycardias. Flecainide significantly prolonged accessory AV pathway anterograde and retrograde refractoriness. Anterograde accessory pathway block occurred in 33% of patients and retrograde accessory pathway block in 44%. Flecainide was successful in the acute termination of 86% of orthodromic atrioventricular reentrant tachycardias. In 15 patients with dual AV nodal pathways, only retrograde "fast" AH pathway refractoriness was significantly increased by flecainide, which was successful in the acute termination of 88% of intra-AV nodal reentrant tachycardias. In 28 patients who underwent endocardial pacing threshold assessment before and after i.v. flecainide, the acute threshold rose by a maximum of 117%, whereas the chronic threshold rose by a maximum of 83%.(ABSTRACT TRUNCATED AT 250 WORDS)
K J Hellestrand; A W Nathan; R S Bexton; A J Camm
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of cardiology     Volume:  53     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  1984 Feb 
Date Detail:
Created Date:  1984-03-22     Completed Date:  1984-03-22     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  30B-38B     Citation Subset:  AIM; IM    
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MeSH Terms
Anti-Arrhythmia Agents / therapeutic use*
Arrhythmias, Cardiac / drug therapy*,  physiopathology
Atrioventricular Node / drug effects,  physiopathology
Cardiac Pacing, Artificial
Heart Conduction System / drug effects*,  physiopathology
Middle Aged
Piperidines / therapeutic use*
Sinoatrial Node / drug effects,  physiopathology
Reg. No./Substance:
0/Anti-Arrhythmia Agents; 0/Piperidines; 54143-55-4/Flecainide

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

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