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Occurrence of atrioventricular block during supraventricular tachycardia: What is its possible mechanism?
MedLine Citation:
PMID:  24225282     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
A female patient was admitted to our hospital for catheter ablation arising from paroxysmal supraventricular tachycardia (PSVT). In the laboratory, PSVT (the earliest retrograde atrial activation at the coronary sinus ostium) with intermittent atrioventricular (AV) block could be induced repeatedly. The tachycardia could be terminated during ventricular pacing without retrograde conduction to the atria. Therefore, orthodromic AV reciprocating tachycardia (AVRT) and atrial tachycardia (AT) could be ruled out and AV nodal re-entrant tachycardia (AVNRT) was subsequently considered. Initial attempts using slow or intermediate AV nodal ablation failed to cure the tachycardia. We considered the possibility of orthodromic AV reciprocating tachycardia (AVRT) with AV block occurring during the tachycardia. The tachycardia was successfully terminated during the ablation of the right posteroseptal pathway at the coronary sinus ostium. We hypothesized about the possible explanation that might help to clarify the phenomenon of AV block during SVT in order to provide some guidance to other clinicians confronted with similar patient challenges in the future.
Authors:
Ho-Shun Cheng; Wei-Ta Chen; Jen-Hung Huang; Ming-Hsiung Hsieh
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-11-11
Journal Detail:
Title:  Journal of the Chinese Medical Association : JCMA     Volume:  -     ISSN:  1728-7731     ISO Abbreviation:  J Chin Med Assoc     Publication Date:  2013 Nov 
Date Detail:
Created Date:  2013-11-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101174817     Medline TA:  J Chin Med Assoc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2013. Published by Elsevier B.V.
Affiliation:
Division of Cardiology, Department of Medicine, Wan-Fang Hospital Taipei Medical University, Taipei, Taiwan, ROC.
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