Ablation of @entity955 and XXXX : Role of bipolar and unipolar energy using a novel multipolar irrigated ablation catheter.

@entity1 @entity162 @entity1208 @entity358 @entity955
BACKGROUND: The circular nMARQ ablation catheter is a useful tool for @entity358 ( @entity358 ). Some studies reported a high incidence of esophageal lesions by using this catheter. OBJECTIVE: The primary aim of this study was to compare the effects on the esophageal wall of bipolar and unipolar energy applied by the nMARQ ablation catheter during AF ablation. METHODS: Forty @entity1 (mean age 53    8 years; 26 [65%] @entity1 ) were enrolled to perform @entity358 for symptomatic @entity955 . Thirty @entity1 underwent @entity358 with the nMARQ catheter (group 1) and 10 @entity1 with the ThermoCool Surround Flow catheter (group 2). The procedures were performed with the CARTO3 system. All @entity1 received an esophageal temperature probe. In group 1, we delivered unipolar energy on the left posterior wall with power between 15 and 18 W or @entity162 with power at 15 W. In group 2, unipolar energy was delivered on the posterior atrial wall at 20-25 W power. All @entity1 underwent esophagoscopy the day after the procedure. RESULTS: No @entity1 had procedural complications. In group 1, @entity162 was associated with a lower esophageal temperature increase as compared with unipolar energy (0.6  C [range 0-2.2  C] vs 2.1  C [range 0.8-2.9  C]; P < .001). Unipolar energy was associated with a similar temperature increase in the 2 groups (1.9  C [range 0.8-2.9  C] in group 1 vs 1.7  C [range 0.7-2.9  C] in group 2; P = .49). No @entity1 had @entity1208 . CONCLUSION: The use of the nMARQ catheter for @entity358 is feasible and safe. The use of 15 W for @entity162 or 15-18 W for unipolar energy is an optimal strategy to avoid @entity1208 with this new catheter.
