A new insight into the anatomical ablation approach at R-L ILT for VAs with a left ventricular summit origination: electrophysiological characteristics and catheter ablation

• DOI: 10.1007/s10840-024-01974-w
• Publication Date: 2025-01-08T08:21:22Z
• Authors: Yang Pang; Ye Xu; Kuan Cheng; Chaofeng Chen; Qingxing Chen; Yunlong Ling; Guijian Liu; Junbo Ge; Wenqing Zhu

Ventricular arrhythmia (VA) originating from the left ventricular summit (LVS) poses particular challenges, with higher rates of ablation failure. To further evaluate anatomical approach subaortic region for LVS VAs and their electrophysiological characteristics. The study enrolled 27 consecutive patients sympatomatic who received an R-L ILT in our center. Three different mapping results were obtained as earliest activation sites (EAS) observed RVOT (group 1), 2), epicardial 3), respectively. A percentage rS/QS patterns lead I was Groups 1 3. narrower QRS duration Group (1) presystolic potential recorded at most group (2) All successfully ablated groups 2, though poor pace ILT. 4/7 3 ultimately failed after both endocardial regions. An effective origin. Different ECG characteristics could be EAS. Poor all regions EAS had predictive value failure procedure.