Fig. 4.

(A) PVBs and NSVTs appeared during ablation because of a possible ectopic mechanism. They completely disappeared 30 s after energization onset. (B) A voltage map obtained during catheter ablation by three-dimensional electroanatomical mapping. The low voltage area was defined as <1.5 mV. The purple area indicates a normal voltage area. Although the voltage of the lateral wall of the right ventricle could not be fully recorded (gray areas do not indicate scar areas, but unrecorded areas), no low voltage area in the right ventricle was confirmed. RF=radiofrequency.