RFCA VAs arising from DGCV-AIV
A total of 2768 VAs received RFCA in our cardiac lab, and 4.44% VAs (123/2768) were found arising from the region of DGCV-AIV. Successful ablation was achived in 102 patients (102/123). As is well-known, DGCV-AIV is the epicardial part of LVOT, the myocardium near the DGCV-AIV can be a source of idiopathic VAs. Yamada T et al. studied 27 consecutive patients with VAs originating from the epicardial LVOT and achieved successful ablation within the DGCV in 14 patients[5]. Hachiya H et al. also reported successful catheter ablation of idiopathic VAs originating from the AIV[6]. More recently, Yuki K et al. reported that 14 patients were found to have summit-CV VAs and successful ablation were achieved in 10 (71%) patients[7]. Therefore, VAs arising from DGCV-AIV was not a rare phenomenon and cathether ablation is an effective treatment for DGCV-AIV VAs.