| Electrophysiological characteristics of accessory pathways with prolonged retrograde conduction. | |
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MedLine Citation:
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PMID: 15461715 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Electrophysiological characteristics of an accessory pathway (AP) with a long ventriculoatrial (VA) interval (arbitrarily defined as > or = 50 ms and absence of continuous electrical activity) and no retrograde decremental property are described in this study. Fifteen patients (group 1) were compared with 171 patients with normal VA conduction (group 2). Mean VA conduction time was 77 +/- 24 versus 34 +/- 12 ms in group 1 versus group 2, respectively. Group 1 patients were older (55 +/- 14 vs 40 +/- 14 years), the male to female ratio was higher (2.8 vs 1.6), and APs were more prevalent on the right (60%) but manifest APs were lower (20% vs 54%) compared to group 2 patients (P < 0.05 in all cases). QRS morphology during induced atrioventricular reciprocating tachycardia was identical in both groups but the tachycardia cycle length was longer in group 1 (373 +/- 29 vs 344 +/- 50 ms, P < 0.05). Retrograde AP block cycle length and effective refractory period were greater in group 1 (362 +/- 59 vs 293 +/- 57 ms; 330 +/- 58 vs 273 +/- 55 ms, both P < 0.05). Adenosine (up to 18 mg) and verapamil (5-10 mg) failed to block the VA conduction via AP during ventricular pacing. In group 1 the number of radiofrequency lesions for a successful ablation were significantly less (3 +/- 2 vs 6 +/- 5, P < 0.05). In conclusion, APs with a long VA interval and no decremental retrograde conduction have electrophysiological characteristics that are different from those with a short VA interval. Role of aging deserves further exploration. |
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Authors:
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Kuo-Hung Lin; Chi-Tai Kuo; Nazar Luqman; Kuang-Hung Hsu; Chiun-Li Wang; Tsu-Shiu Hsu; Ying-Shiung Lee |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Pacing and clinical electrophysiology : PACE Volume: 27 ISSN: 0147-8389 ISO Abbreviation: Pacing Clin Electrophysiol Publication Date: 2004 Sep |
Date Detail:
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Created Date: 2004-10-05 Completed Date: 2005-02-15 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7803944 Medline TA: Pacing Clin Electrophysiol Country: United States |
Other Details:
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Languages: eng Pagination: 1250-6 Citation Subset: IM |
Copyright Information:
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Effect of Pacing Site and Lead Tip to Ring Distance |
Affiliation:
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Department of Cardiology, Chang Gung University and Chang Gung Memorial Hospital, Linkou, Taiwan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Catheter Ablation Female Heart Conduction System / physiopathology* Humans Male Middle Aged Tachycardia / physiopathology* Wolff-Parkinson-White Syndrome / physiopathology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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