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Extension of catheter ablation and outcome for ventricular tachycardia or premature ventricular contractions from the right ventricular outflow tract

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Author(s)
Ki-Hun KimHyoung-Seob ParkYeo-Jung SongJeong-Sook SeoHan-Young JinDae-Kyeong KimDong-Soo KimYoung-Soo LeeKi-Won HwangGuang-Won SeoDong-Kie KimPil-Sang SongSang-Hoon SeolDoo-Il KimYoon-Nyun Kim 
Keimyung Author(s)
Kim, Yoon NyunPark, Hyoung Seob
Department
Dept. of Internal Medicine (내과학)
Journal Title
Acta Cardiologica
Issued Date
2017
Volume
72
Issue
1
Keyword
Premature ventricular contractionradiofrequency catheter ablationventricular tachycardia
Abstract
Objective: We aimed to determine whether the extension of ablation could influence the ablation outcome for ventricular tachycardia (VT)/premature ventricular contractions (PVCs) from the right ventricular outflow tract (RVOT).

Methods and results: The radiofrequency catheter ablation results of 33 VT/6 frequent PVCs from the RVOT were analysed. The ablation extension was divided into 3 categories from the final successful ablation point with the earliest activation: (I) focal ablation (15 cases); ablation at 1 or 2 points; (II) focal with extended ablation (12 cases); focal and surrounding area ablation (maximum ≤1 cm) after elimination of clinical VT/PVCs; and (III) broad ablation (12 cases); continued broad ablation (maximum >1 cm) after elimination of clinical VT/PVCs. Acute termination was defined as the complete elimination and non-inducibility of clinical VT/PVCs during the procedure. For the mean follow-up of 12.8 months, the recurrence rate was not significantly different among the groups (P = 0.49). The mean procedure time was longer in group II, but ablation times and complication rates were not different among the groups. When acute termination was achieved, the overall recurrence rate was 7.6%. However, when confirming absence of the clinical VT/PVCs using 24-hour Holter monitoring immediately after the procedure, the recurrence rate was 2.7%.

Conclusions: Ablation extension did not affect ablation outcome of VT/PVCs from the RVOT. Confirmation of absence of clinical VT/PVCs using 24-hour Holter monitoring immediately after the procedure could guarantee long-term success.
Keimyung Author(s)(Kor)
김윤년
박형섭
Publisher
School of Medicine
Citation
Ki-Hun Kim et al. (2017). Extension of catheter ablation and outcome for ventricular tachycardia or premature ventricular contractions from the right ventricular outflow tract. Acta Cardiologica, 72(1), 68–74. doi: 10.1080/00015385.2017.1281523
Type
Article
ISSN
0001-5385
Source
https://www.tandfonline.com/doi/full/10.1080/00015385.2017.1281523
DOI
10.1080/00015385.2017.1281523
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/32683
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Internal Medicine (내과학)
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