Radiofrequency ablation for ventricular premature beat guided by CARTO3 system
LIU Jian-guo
XU Ai-bin
SHI Hong-ling
TAN Chen
CUI Jun-yu
Abstract：Objective To discuss the approaches and success rate of radiofrequency ablation for ventricular premature beat (VPB) guided by CARTO3 system. Methods The original sites of VPB were initially decided according to surface electrocardiogram and ambulatory electrocardiogram in 61 patients. The activation mapping was carried out guided by CARTO3 taken the earliest activation points and QS showed in local unipolar electrocardiogram as targets. Temperature controlled radiofrequency catheter was used, and the powder was from 20 W to 50 W. Results VPB was derived from right ventricular outflow tract (RVOT) in 33 patients and success rate of radiofrequency ablation was 90.9%, and success rate was 93.1%in patients with VPB derived from RVOT septum. VPB was derived from atrioventricular annulus in 7 patients and success rate of radiofrequency ablation was 85.7%. Intrinsicoid deflection time (IDT) of the earliest ventricular activation in V2 lead to R inter-peak latency of surface electrocardiogram was significantly shorter in patients with non-left ventricular outflow tract and successful radiofrequency ablation than that in those with unsuccessful radiofrequency ablation (34.2±8.4 ms vs. 51.6±17.9 ms, P<0.01). Conclusion Radiofrequency ablation guided by CARTO3 is safe and effective in patients with VPB derived from ventricular outflow tract and atrioventricular annulus. The success rate is the highest in the patients with VPB derived from RVOT. IDT plays a guiding role in predicting the success rate of radiofrequency ablation before the operation.
Keywords：CARTO3 systemVentricular premature beatRadiofrequency ablationElectrophysiology
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 483-485 )