AB-452663-3 DISTRIBUTION OF TRIGGERS IN THE LEFT ATRIAL POSTERIOR WALL IN AF PATIENTS UNDERGOING CATHETER ABLATION

Having a common embryologic origin with the pulmonary veins (PVs), left atrial posterior wall (LAPW) is considered to be source of non-PV triggers that facilitate maintenance fibrillation (AF). However, benefits electrical isolation (PWI) still debated contradictory data originating from different ablation approaches. . We report distribution in LAPW area AF patients undergoing repeat ablation. Consecutive catheter between 2015 and 2022 were included this analysis. PVs isolated first. Next, high-dose isoproterenol challenge (up 30μg/min) was used disclose PW by moving circular mapping along down level coronary sinus, which targeted using additional RF energy. defined lower part as line joining inferior borders PV-encircling lesions sinus. The endpoint achieve isolation, documented absence any activity PW. Of 10,390 ablations performed during specified time period, 5843 (56.2%) had mapped ablated area. Triggers seen 3809 (65.2%), 2028 (34.7%) focal all over including 1519 (26%) cases. All for Figure 1 demonstrates arising Ectopic large number Thus, operators should consider extending include maximize PWI.