Follow-up and late outcome
With the median follow-up of 12.8 months, ATA-free rate was 81% and 72% at 6 months and 1 year after the procedure, respectively. Excluding patients with SHD increased this value to 86% and 83% at 6 months and 1 year after the procedure, respectively. Late adverse event was not observed during the follow-up period. Of patients with late recurrence, 12 patients underwent a redo procedure. Ten patients had the segments with late PVRs which consisted of 1 left infero-anterior, 4 left infero-posterior, 5 left supero-posterior, 3 right infero-anterior, 1 right bottom, 1 right infero-posterior, 2 right supero-anterior, and 5 right supero-posterior: 9 (38%) SAEs versus 17 (14%) segments other than SAE (p = 0.01). Only three segments with late PVR matched those with acute ones. There was no significant difference in 3-D mapping-related indices between the segments with late PVR and those without. Only Imp-min tended to be higher in the segments other than SAE without late PVRs than in those with (4.7±4.3 versus 2.7±3.3, p = 0.09).