Analysis on ablation pressure and clinical outcomes of catheter ablation for premature ventricular contraction originating from right ventricular outflow tract
Shan Liang
Tang Min
Jia Shujie
Chen Keping
Zhang Tao
Abstract：Objective To observe the discharging pressure of catheter ablation for premature ventricular contraction originating from right ventricular outflow tract (RVOT-PVCs) and the influence on postoperative early recurrence of premature ventricular contraction.Methods Forty-three patients with RVOT-PVCs were consecutively enrolled from March 2014 to March 2017 in Fuwai Hospital,Chinese Academy of Medical Science.They were treated by radiofrequency ablation using pressure-sensitive catheter.According to the site of ablation targets(134 in total),the cases were divided into right ventricular septum group and free wall group.Ablation pressure of different sites and the relation with early recurrence in 6 months after operation were analyzed.Results The mean ablation pressure of 134 sites was (12 ± 8) g.The mean ablation pressure in the free wall group(64 sites) was lower than that in the septum group (70 sites) [(11 ± 4) g vs (13 ± 9) g] (P ＜ 0.05).Multivariate analysis showed that ablation pressure (odds ratio =1.219,95％ confidence interval:1.114-1.335,P ＜ 0.001) and ablation target (odds ratio =2.821,95 ％ confidence interval:1.294-6.146,P =0.005) were related with early recurrence of RVOT-PVCs.During 6 months of follow-up,the free wall group showed a high recurrence rate;92.9％ (13/14)of the recurrent sites with ablation pressure 5-15 g originated from free wall.Conclusions Ablation pressures for RVOT-PVCs originated from right ventricular septum and free wall are quite different.Ablation pressure and target site are related with postoperative early recurrence.
Keywords：Premature ventricular contractionRight ventricular outflow tractAblation pressureCatheter ablation
Publication Date：2019-01-01
Online Publishing Date：2026-09-14(First online date of this platform, not the publication date of the document)
Pages：4( 1761-1764 )