Surface electrocardiogram analysis of supravalvular and subvalvular ventricular arrhythmias originating from right ventricular outflow tract
HUANG Jin-huan
XIE Peng
SUN Yu
LI Shi-xing
LI Jian
YUAN Hong-tao
GUO Jian-ping
GUO Hong-yang
SHI Xiang-min
SHAN Zhao-liang
Abstract：Objective To explore the electrocardiogram(ECG)characteristics of the patients with ventricular arrhythmias(VAs)originated from supravalvular and subvalvular right ventricular outflow tract(RVOT)so as to locate the VAs accurately.Methods A total of 139 patients with VAs originating from RVOT who underwent radiofrequency ablation in the First Medical Center of PLA General Hospital from October 2018 to October 2022 were enrolled.According to the location of the origin point to the pulmonary valve,they were divided into the supravalvular origin group and subvalvular origin group.Results Among 139 patients with VAs originating from RVOT,71patients(51.1%)had VAs originating from the supravalvular region,including 43(30.9%)in the left sinus,11(7.9%)in the right sinus,7(5.0%)in the anterior sinus and 10(7.2%)in the junction between the left and right sinuses;68 patients(48.9%)had VAs originating from the subvalvular region,including 14(10.1%)from the free wall and 54(38.8%)from the ventricular septum.The R wave amplitude in leadⅡand aVF of VAs in patients with supravalvular origin was significantly higher than that in patients with subvalvular origin.In the supravalvular origin group,there were significant differences in the surface electrocardiogram of VAs originating from different supravalvular locations.The QRS duration of VAs originating from the subvalvular free wall was significantly longer than that of VAs originating from the ventricular septum,and the incidence of QRS notch in the inferior leads was significantly higher than that of VAs originating from the ventricular septum.Conclusions VAs originating from supravalvular and subvalvular regions of pulmonary artery have different electrocardiographic features.The origin of VAs could be preliminarily judged according to the electrocardiographic features.
Keywords：Right ventricular outflow tractPulmonary arteryVentricular arrhythmiasSurface electrocardiogram
Publication Date：2023-12-10
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1106-1110 )