PO-02-121 IMPACT OF PULMONARY VEIN OVALITY AND OCCLUSION STATUS MEASURED BY THE NOVEL DIELECTRIC-BASED MAPPING SYSTEM ON ACUTE VEIN ISOLATION DURING CRYOBALLOON ABLATION

Cryoballoon ablation (CBA) has been widely accepted as a major technic for pulmonary vein isolation (PVI) in patients with atrial fibrillation (AF). PV anatomy is an important factor to obtain circumferential balloon adhesion that results occlusion achieve acute PVI. The KODEX-EPD (Philips, Amsterdam, Netherlands) dielectric-based electroanatomic mapping system can display panoramic (PANO) view of the left atrium and evaluate without other imaging modalities. Prior studies demonstrated high ovality potential mechanism impeding formation durable lesion. However, accuracy assessed by how it influences performance tool PVI are still unknown. To assess using system, them their impact on We enrolled 10 who underwent primary CBA paroxysmal AF all had pre-procedural cardiac CT or MRI. Ovality index (OI) was defined ratio maximum diameter divided minimum which measured under PANO CT/MRI images sagittal view. An evaluation obtained Occlusion Viewer intracardiac echography each CB-PV engagement. Single shot at first freezing attempt after complete PV. Fifty-eight balloon-PV engagements 39 PVs were analyzed. Consistent status between KODEX ICE 50 (86%) [complete occlusion: 30/34 (88%), incomplete 20/24 (83%)]. OI significantly larger than (2.0±0.5 vs 1.6 ±0.4. p=0.03). Representative cases shown Figure1A B. achieved 33 (84%). All showed KODEX, single smaller (1.6±0.4 2.1±0.4, p=0.003). A positive correlation found (Figure1C). novel feasible may facilitate CB AF. Higher associated lower rate.