Analysis of the electrocardiogram characteristics of premature ventricular contractions originating from the left sinus-anterior sinus of the pulmonary artery
10.3969/j.issn.1671-8348.2025.05.028
- VernacularTitle:起源于肺动脉左窦-前窦室性早搏的心电图特征分析
- Author:
Qian ZHANG
1
;
Zongqi ZHANG
Author Information
1. 上海交通大学医学院附属第九人民医院心血管内科,上海 201999
- Keywords:
junction of the left sinus-anterior sinus of the pulmonary artery;
premature ventricular con-traction;
QRS morphology;
radiofrequency ablation
- From:
Chongqing Medicine
2025;54(5):1201-1206
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the electrocardiogram(ECG)characteristics of premature ventricular contractions(PVC)originating from the left sinus-anterior sinus of the pulmonary artery,so as to quickly make a preliminary localization of the origin of PVC.Methods Surface 12-lead ECG,simulated 12-lead ECG and three-dimensional mapping were used to detect 12 patients admitted to this hospital.The characteristics of PVC were analyzed,and the origin of PVC was preliminarily localized according to the transition characteris-tics of the thoracic leads and the QRS morphology in the leads.Results PVC originating from the left sinus-anterior sinus of the pulmonary artery showed a pattern similar to complete left bundle branch block.There were 9 cases of patients(75.00％)with the transition zone index ≥ 0.There were 9 cases of patients(75.00％)with the R wave duration index in lead V2＜50％,and 3 cases of patients(25.00％)with the R wave duration index in lead V2≥50％.There were 8 cases of patients(66.67％)with the R/S amplitude index in lead V2＜30％,and 4 cases of patients(33.33％)with the R/S amplitude index in lead V2≥ 30％;There were 8 cases of patients(66.67％)with the SV2/Rv3 index＞l.5,and 4 cases of patients(33.33％)with the SV2/Rv3 index≤1.5.Conclusion Using 12-lead ECG has a high accuracy for the localization diagnosis of PVC originating from the left sinus-anterior sinus of the pulmonary artery.
