| Electrocardiographic predictors of failure and recurrence in patients with idiopathic right ventricular outflow tract tachycardia and ectopy who underwent radiofrequency catheter ablation. | |
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MedLine Citation:
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PMID: 14661169 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study reports new electrocardiographic (ECG) predictors of radiofrequency catheter ablation failure and recurrence in idiopathic right ventricular outflow tract (RVOT) ventricular tachycardia (VT) or ectopy based on 91 consecutive patients. Procedural success and failure rates were 85% (77/91) and 15% (14/91), respectively. Twenty three percent (18/77) had recurrence during the follow-up period of 1 to 120 months (mean 56 +/- 31 months). Baseline RVOT VT/ectopy on 12-lead ECG taken prior to ablation from 91 patients were retrospectively analyzed. Ablation performed with RVOT ectopy (isolated ectopies, bigeminy, trigeminy, or couplets) as template arrhythmia was more likely to fail (30% vs. 8%, P =.02) as opposed to RVOT VT (sustained or nonsustained). VT/ectopy-QRS morphology variation was more observed in failed ablations (36% vs. 7%, P =.001). Significantly wider mean VT/ectopy QRS in leads I, II, AVR, V2, V3, V5, and V6 were noted in failed ablation group. Mean R wave amplitude reached statistical significance only in lead II (22.0 +/- 5.1 mV for failed vs. 17.8 +/- 5.2 mV for successful outcomes; P =.009). QRS morphologic variation (47% vs. 16%; P =.009) was the only statistically significant ECG to be more common in patients with arrhythmia recurrence. In conclusion, ablation with ectopy over VT as template arrhythmia, presence of QRS morphologic variation, wider mean QRS width, and taller mean R-wave amplitude in lead II were identified ECG predictors of failed RVOT VT/Ectopy ablation. The only ECG predictor of recurrence was the presence of RVOT VT or ectopy QRS morphologic variation. |
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Authors:
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Marivic Vestal; Ming-Shien Wen; San-Jou Yeh; Chun-Chieh Wang; Fun-Chung Lin; Delon Wu |
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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: Journal of electrocardiology Volume: 36 ISSN: 0022-0736 ISO Abbreviation: J Electrocardiol Publication Date: 2003 Oct |
Date Detail:
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Created Date: 2003-12-08 Completed Date: 2005-06-28 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0153605 Medline TA: J Electrocardiol Country: United States |
Other Details:
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Languages: eng Pagination: 327-32 Citation Subset: IM |
Affiliation:
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Department of Medicine, Second Section of Cardiology, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taipei, Taiwan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Aged Aged, 80 and over Bundle-Branch Block / diagnosis, etiology*, surgery* Catheter Ablation* Child Electrocardiography* Electrophysiologic Techniques, Cardiac Female Follow-Up Studies Humans Male Middle Aged Postoperative Complications / diagnosis, etiology Predictive Value of Tests Recurrence Retrospective Studies Tachycardia, Ventricular / diagnosis, etiology*, surgery* Time Treatment Failure Ventricular Outflow Obstruction / diagnosis, etiology*, surgery* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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