PO-01-094 LESION SIZE INDEX-GUIDED HIGH POWER ABLATION FOR PULMONARY VEIN ISOLATION IN PATIENTS WITH PAROXYSMAL ATRIAL FIBRILLATION: PROCEDURAL DATA AND LONG TERM OUTCOME

Lesion size index (LSI) is useful to complete pulmonary vein isolation (PVI) for atrial fibrillation (AF). High-power application with LSI guided ablation strategy (HP-LSI) may shorten the time PVI. However, long-term outcome HP-LSI was limited. To assess rhythm between HPSD and strategies. 147 paroxysmal AF patients who underwent PVI by TactiCath catheter were enrolled retrospectively. The first 80 assigned high power short duration (HPSD, anterior wall 50W, posterior 40 W, 10 seconds each lesion), subsequent 67 applied (anterior 50W/LSI at least 5.0, 40W/LSI 4.0 4.5, 20 limited lesion). primary recurrence groups. first-pass rate considered as secondary outcome. Over 12 months of follow-up, there a significantly lower in group compared (14.9% vs. 32.5%, p = 0.020). shorter (63.7 minutes 87.7 minutes, < 0.001), pass higher both PVs (RPV: 42.2% 13.7%, 0.003; LPV: 66.7% 31.4%, 0.001) than group. Besides, fewer gaps found several PV segments after circumferential ablation. can HPSD. decreases gap rates RPV LPV. Compared HPSD, result durable