PO-624-06 THE DIELECTRIC IMAGING SYSTEM IS SUPERIOR TO FLUOROSCOPY IN PREVENTING ATRIAL FIBRILLATION RECURRENCE AFTER CRYOABLATION

Abstract

Dielectric imaging system allows a better visualization of pulmonary veins anatomy and occlusion assessment without dye use. Outcome data is still limited for this imaging system. We aim to analyze short-term atrial fibrillation (AF) recurrence outcomes when using dielectric imaging system mapping during cryoablation procedures. We retrospectively analyzed 32 patients who underwent cryoablation procedure in a single institution. Of those, 19 procedures were performed using dielectric imaging system while 13 procedures were performed using fluoroscopy (control group). Short-term 3-month recurrence outcomes were collected for all patients. Both groups were comparable in terms of sex (47% vs 38% males, p=0.62), age (61 vs 67 years, p=0.10), congestive heart failure (p=0.33), diabetes mellitus (p=0.31), history of stroke (p=0.79), history of coronary artery disease (p=0.46), hyperlipidemic profile (p=0.06). However, hypertension was more frequent in the control group than the dielectric imaging system group (p=0.03). On 3-month follow-up, 2 patients in the dielectric imaging system group had AF recurrence post-ablation, while 6 patients had AF recurrence in the control group. There was significant difference in AF recurrence rates between both groups (10% in the dielectric imaging system group vs 54% in the control group, p=0.007). Dielectric imaging system is superior to fluoroscopy during cryoablation procedure in preventing AF recurrence. Long-term larger prospective studies are needed to confirm the efficacy of the dielectric imaging system.