Document Detail


High variability of retrograde fast pathway sensitivity to adenosine.
MedLine Citation:
PMID:  10941542     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Adenosine is widely used as a tool to assess the effectiveness of radiofrequency ablation of concealed accessory pathways. HYPOTHESIS: The goal of this study was to determine the reliability of this test by studying the retrograde fast pathway sensibility in a large patient population with typical atrioventricular (AV) nodal reentry tachycardias. We sought also to determine whether AV nodal properties were predictive of a retrograde fast pathway sensitivity to adenosine. METHODS: In all, 124 patients with inducible AV nodal reentrant tachycardia were included in this study. All patients received a clinically used standard dose of 12 mg adenosine during ventricular pacing, with 500 ms and a constant ventriculoatrial (VA) conduction via the fast pathway. Electrophysiologic parameters of the AV node were determined in all patients in order to correlate them with the adenosine sensitivity of the retrograde pathway. RESULTS: In 74 patients, the injection of 12 mg adenosine resulted in a transient VA block, whereas no VA block occurred in the remaining 50 patients. In two patients, concealed accessory pathways were unmasked after the injection of adenosine. The adenosine sensitivity of the retrograde fast pathway was associated with longer retrograde conduction times and cycle lengths during AV nodal reentrant tachycardias. CONCLUSION: This study shows a high variability of retrograde fast pathway sensitivity to adenosine. Thus, in 40% of patients the lack of VA block after adenosine injection is not specific for persistent accessory pathway function after radiofrequency ablation. Electrophysiologic properties of patients with AV nodal reentrant tachycardias were different in patients with and without adenosine-sensitive retrograde fast pathways, possibly indicating differential patterns of penetration of the retrograde fast pathway into the compact AV node.
Authors:
C Mewis; V Kühlkamp; J Mermi; R F Bosch; L Seipel
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical cardiology     Volume:  23     ISSN:  0160-9289     ISO Abbreviation:  Clin Cardiol     Publication Date:  2000 Aug 
Date Detail:
Created Date:  2001-02-02     Completed Date:  2001-02-02     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7903272     Medline TA:  Clin Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  576-8     Citation Subset:  IM    
Affiliation:
Department of Cardiology, University Hospital Tübingen, Germany.
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MeSH Terms
Descriptor/Qualifier:
Adenosine / diagnostic use*
Adult
Anti-Arrhythmia Agents / diagnostic use*
Electrophysiology
Female
Humans
Male
Reproducibility of Results
Tachycardia, Atrioventricular Nodal Reentry / physiopathology*
Chemical
Reg. No./Substance:
0/Anti-Arrhythmia Agents; 58-61-7/Adenosine

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


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