Difference between Epicardial and Gap Conduction in Acute PVR
AEPVR could be considered as an intermediate state of lesion formation
between durable isolation and endocardial conduction gap. The 2 types of
PVR can be distinguished by remapping the regions of PVs and the antrum.
Compared to AEPVR mostly at interpulmonary regions, the endocardial or
transmural reconnections were distributed widely in almost all segments
along the ablation circle. The typical characteristics of endocardial
gap was the near-field EGMs present at the prior lesion with
fractionation. Although there were multiple factors in terms of ablation
parameters associated with AEPVR in the whole cohort, inter-lesion
distance was the only factor showing difference between endocardial gap
and AEPVR in our study, suggesting its tendency to impact the
endocardium.