| Ablation of idiopathic ventricular tachycardia in two separate regions of the outflow tract: prevalence and electrocardiographic characteristics. | |
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MedLine Citation:
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PMID: 17302726 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Few studies have clarified the prevalence and characteristics of idiopathic outflow tachycardia (OT-VT) with an altered QRS morphology after radiofrequency catheter ablation (RFCA), requiring additional RFCA applications at a different portion of the outflow tract (OT) to abolish the OT-VT. Among 344 patients (97 VTs and 247 premature ventricular contractions), 12 (3.5%; VTs-7, PVCs-5; 6 women) had dynamic QRS morphology changes following the RFCA, requiring additional RFCA applications at a different portion to abolish the OT-VT. In 8 of 12 patients (67%), this phenomenon occurred following RFCA at right (RVOT; n = 7) or left ventricular (LVOT; n = 1) endocardial sites of the OT: The second OT-VT was consistently associated with an increase in the R-wave amplitude in the inferior leads, and in five it was finally abolished by RFCA at the left sinus of Valsalva (LSV). Conversely, in four patients (33%), the second OT-VT appeared after RFCA at the LSV: two required additional RFCA applications at the LVOT to abolish the second OT-VT, and one at the RVOT, and all were associated with a decrease in the R-wave amplitude in the inferior leads. This kind of dynamic QRS morphology change was often observed when RFCA was applied to either the first or second OT-VT at a right or left ventricular endocardial site, with the other site being the LSV. A detailed continuous observation of the QRS morphology, especially of the R-wave in the inferior leads, is important for identifying changes in the QRS morphology during RFCA. |
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Authors:
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Kenichi Kaseno; Hiroshi Tada; Sachiko Ito; Kazuyoshi Tadokoro; Tohru Hashimoto; Kohei Miyaji; Shigeto Naito; Shigeru Oshima; Akihiko Nogami; Koichi Taniguchi |
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Publication Detail:
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Type: Clinical Trial; Journal Article |
Journal Detail:
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Title: Pacing and clinical electrophysiology : PACE Volume: 30 Suppl 1 ISSN: 0147-8389 ISO Abbreviation: Pacing Clin Electrophysiol Publication Date: 2007 Jan |
Date Detail:
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Created Date: 2007-02-16 Completed Date: 2007-06-12 Revised Date: 2008-01-18 |
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: S88-93 Citation Subset: IM |
Affiliation:
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Division of Cardiology, Gunma Prefectural Cardiovascular Center, Maebashi, Gunma, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Catheter Ablation* Electrocardiography / methods* Female Humans Male Middle Aged Tachycardia, Ventricular / diagnosis, physiopathology*, surgery* Ventricular Dysfunction, Left Ventricular Dysfunction, Right |
| Comments/Corrections | |
Erratum In:
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Pacing Clin Electrophysiol. 2007 Nov;30(11):1426 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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