Abstract 18569: Effect of Pulmonary Vein Orifice Area Assessed by Intracardiac Echocardiography on the Outcome of Catheter Ablation for Atrial Fibrillation
Introduction: Pulmonary veins (PV) isolation has been established as the treatment for atrial fibrillation (AF). No prior studies have quantitatively analyzed the PV orifice area.
Hypothesis: The purpose of the present study was to investigate the effect of the PV orifice area assessed by intracardiac echocardiography (ICE) on the outcome of catheter ablation (CA) for AF.
Methods: A total of 46 consecutive patients undergoing CA for AF (paroxysmal 80.4 %, persistent 19.6 %, mean age 60.4 ± 12.0 years, 35 men) were studied. The maximum and the minimum cross-sectional orifice area (CSOA) of each PV, which were standardized with body surface area, were evaluated using ICE.
Results: The maximum / minimum CSOA index of left superior, left inferior, right superior and right inferior (RI) PV were 147.1 ± 60.7 / 120.8 ± 56.6, 90.4 ± 30.6 / 72.3 ± 27.0, 135.4 ± 44.2 / 106.1 ± 31.1 and 111.1 ± 40.9 / 92.8 ± 33.32 cm2/m2, respectively. After a mean follow-up of 308 ± 210 days, 9 patients showed AF recurrence. No parameters were different between the recurrence group and the non-recurrence group except the minimum CSOA index of RIPV (88.0 ± 25.7 cm2/m2 vs 112.5 ± 52.2 cm2/m2, p = 0.046).
Conclusions: The minimum CSOA index of RIPV is significantly greater in the AF recurrence group.
Author Disclosures: T. Nakashima: None. T. Kubota: None. N. Takasugi: None. H. Kanamori: None. H. Ushikoshi: None. M. Kawasaki: None. K. Nishigaki: None. S. Minatoguchi: None.
- © 2016 by American Heart Association, Inc.