Long-term success rate of MI ablation
The intervals between the initial and next ablation process were 418 ± 336 days in the RF group and 335 ± 239 days in the EIVOM/RF group. Table 3 demonstrates the reconnection rate of each ablation site in the subsequent ablation session. Reconnections of MI line were observed in 39/80 (49 %) (endocardium = 10, epicardium = 9, both = 20) in the RF group and 25/43 (58%) (endocardium = 10, epicardium = 2, both = 13) in the EIVOM/RF group (p = 0.32). In the subsequent ablation session, MI line blocks were recreated only for EIVOM in five patients who did not undergo EIVOM in the previous ablation session. The second ablation fully recreated an MI line block in 36/39 patients of the RF group (RF and 9 EIVOMs) and in 22/25 patients of the EIVOM/RF group (only RF), respectively.
PV reconnections were 44/80 (55%) (left PV = 13, right PV = 10, both =21) in the RF group and 30/43 (70%) (left PV = 4, right PV = 11, both = 15) in the EIVOM/RF group (p = 0.11). Bottom line reconnections were 23/59 (39%) in the RF group and 14/22 (64%) in the EIVOM/RF group (p = 0.05).
Supplementary data 2 shows the univariate and multivariate analyses regarding MI reconnections in this study. They demonstrated no predictive value.