Correlation Study between the Ablation Target of Ventricular Arrhythmia Originated from Right Ventricular Outflow Tract and the Distribution of Abnormal Voltage Region
- VernacularTitle:右室流出道起源的室性心律失常消融靶点与电压异常区位置分布的相关性研究
- Author:
Yang PANG
1
;
Kuan CHENG
;
Ye XU
;
Qingxing CHEN
;
Wenqing ZHU
Author Information
1. 复旦大学附属中山医院心血管内科
- Keywords:
Premature ventricular complex;
Radiofrequency catheter ablation
- From:
Chinese Journal of Clinical Medicine
2015;(3):318-321
- CountryChina
- Language:Chinese
-
Abstract:
Objective:(1)To explore the distribution features of ablation target of premature ventricular complex(PVC) origi‐nated from right ventricular outflow tract(RVOT) and ventricular tachycardia(VT) and its voltage characteristics .(2)To ex‐plore the relationship between ventricular arrhythmia originated from RVOT and regional low voltage of ROVT .Methods:A to‐tal of 97 patients ,who were indicated as ventricular arrhythmia originated from RVOT by electrocardiogram ,underwent radio‐frequency catheter ablation (RFCA) .During the operation ,99 morphologies of PVC and 6 morphologies of VT were recorded . Detailed three‐dimensional electroanatomical voltage mapping were performed prior to the RFCA .The voltage on bipolar elec‐trogram was defined as follows:amplitude < 0 .5 mV as“low‐voltage zone ,” amplitude between 0 .5 and 1 .5 mV as “transi‐tional‐voltage zone ,” and amplitude >1 .5 mV as “normal‐voltage zone .” Results:Successful ablation was acquired in 87 pa‐tients .Ablation was failed in 10 patients .Two patients’ ventricular arrhythmia originated from Valsava sinus and the others o‐riginated from RVOT .Among the patients with PVC originated from RVOT ,there were 8 targets in the low‐voltage zone ,59 targets in the transitional‐voltage zone ,and 30 targets in the normal‐voltage zone .Among the patients with abnormal voltage at target ,there were 3 ablation targets located in the low‐voltage and transitional‐voltage zone below the pulmonary valve and 34 ablation targets located in the regional low‐voltage and transitional‐voltage zone .Conclusions:The majority of successful abla‐tion targets of RFCA performed for ventricular arrhythmia originated from RVOT were located in the transitional‐voltage zone . The myocardial sleeve below pulmonary valve and regional fibrofatty myocardial tissue may be one the main pathogensis of ven‐tricular arrhythmia originated from RVOT .
