摘要
目的探讨起源于肺动脉左窦-前窦室性早搏(PVC)的心电图特征,以便快速对室性早搏的起源作初步定位。方法采用体表12导联心电图,模拟12导联心电图和三维标测图对本院收治的12例PVC患者进行检测,分析PVC的特点,根据PVC在胸导联移行特点及导联中的QRS形态对PVC的起源部位进行初步定位。结果起源于肺动脉左窦-前窦的PVC呈类完全性左束支传导阻滞图形。移行区指数≥0者9例(75.00%)。V2导联R波时限指数<50%者9例(75.00%),V2导联R波时限指数≥50%者3例(25.00%);V2导联R/S振幅指数<30%者8例(66.67%),V2导联R/S振幅指数≥30%者4例(33.33%);S_(V2)/R_(V3)指数>1.5者8例(66.67%),S_(V2)/R_(V3)指数≤1.5者4例(33.33%)。结论采用12导联心电图定位诊断起源于肺动脉左窦-前窦的PVC具有较高准确性。
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 characteristics 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 S V2/R V3 index>1.5,and 4 cases of patients(33.33%)with the S V2/R V3 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.
作者
张茜
张宗棨
ZHANG Qian;ZHANG Zongqi(Department of Cardiovascular Medicine,Shanghai Ninth People’s Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai 201999,China)
出处
《重庆医学》
2025年第5期1201-1206,共6页
Chongqing Medical Journal
关键词
肺动脉左窦-前窦连接处
室性早搏
QRS形态
射频消融
junction of the left sinus-anterior sinus of the pulmonary artery
premature ventricular contraction
QRS morphology
radiofrequency ablation
