三尖瓣环室早室速消融--第二届亚太心律失常年会

三尖瓣环室早室速消融--第二届亚太心律失常年会

Abstract

Objectives The purpose this study was to assess the safety and feasibilty of the noncontact mapping system in guiding ablation of ventricular arrhythmias (VAs) originating from the tricuspid annulus.

Background VAs originating from the tricuspid annulus was uncommon and the ablation results was unsatisfactory. We sought to determine whether the noncontact mapping system could be used to guide ablation in patients with VAs originating from the tricuspid annulus.

Methods Twenty-four patients with symptomatic premature ventricular contractions (PVCs) or ventricular tachycardia (VT) were included. Mean age was 44±24 years old. Syncope occurred in 2 patients. A noncontact mapping array balloon catheter was successfully deployed in the upper or lower right ventricular (RV) through the femoral vein or the subclavian vein. RV was reconstructed in three dimensions. Radiofrequency catheter ablation was delivered at the origin of VAs defined by the virtual unipolar electrogram on the isopotential map. The characteristics of the surface ECG of different VAs were analyzed. Results All Array balloon catheter were successfully deployed in all patients except one. The acute ablation success rate was 92% (22/24). In VAs originated from the lateral wall of the tricuspid annulus, the QRS width（165 ±18