Major Findings
We have the following major findings in the study: (1) Epicardial fibers was responsible for over half of the acute PVR in this study, which required a longer waiting period than endocardial gap. (2) Two typical distribution patterns of AEPVR were discovered, including epicardial reconnection over the ablation line on the posterior wall, and late manifestation of ICB conduction. (3) AEPVR demonstrated similar characteristics as delayed epicardial PVR in repeat procedures. (4) Presence of AEPVR was significantly associated with multiple ablation parameters.