PO-01-104 3D MODELING OF PRE-PROCEDURE CT SCAN TO PREDICT SEVERE ESOPHAGEAL HEATING DURING HIGH POWER SHORT DURATION ATRIAL FIBRILLATION ABLATION

The degree of esophageal heating during left atrial posterior wall (LAPW) ablation is a powerful predictor injury. Esophageal temperature monitoring has not been shown, however, to reduce injury risk related fibrillation (AF) ablation. proximity modeling based on pre-procedure CT scan using ADAS 3D software (ADAS3D Medical, Barcelona, Spain) novel method identifying locations at high for severe heating. Given the mobile nature esophagus relative LAPW, predictive value mapping unclear. To determine identify LAPW sites Pre-procedure scans were analyzed in 10 patients undergoing AF create model and tissue thickness map that merged with catheter electroanatomic (Ensite X, Abbott, Inc.). was defined as: Zone 1 – overlying esophagus, 2 within 5 mm or 3 > from esophagus. lesions created contact-force sensing radiofrequency (Tacticath, Inc.) 45W, 10-20g force, 6 seconds duration. A 12 sensor probe (Circa, Circa Scientific, recorded increase each lesion. Ablation resulted significantly lower rise (degrees Celsius) as compared either (mean 0.11 ± 0.27 vs 1.61 1.39, p <0.0001) 0.84 1.1, (Fig A). Lesions ±1.1 vs. Within Zones 2, less those ≤ B). delivered >5mm location time are very unlikely result significant 2mm greatest Analysis may be useful developing strategies avoid RF