Acute and Long-Term Outcomes of Catheter Ablation of Atrial Fibrillation Using the Second-Generation Cryoballoon versus Open-Irrigated Radiofrequency: A Multicenter Experience

作者：Aryana Arash; Singh Sheldon M; Kowalski Marcin; Pujara Deep K; Cohen Andrew I; Singh Steve K; Aleong Ryan G; Banker Rajesh S; Fuenzalida Charles E; Prager Nelson A; Bowers Mark R; D' Avila Andre; O' Neill Padraig Gearoid

来源：Journal of Cardiovascular Electrophysiology, 2015, 26(8): 832-839.

DOI：10.1111/jce.12695

• atrial fibrillation
• catheter ablation
• cryoablation
• cryoballoon
• phrenic nerve palsy

Second-Generation Cryoballoon versus RF
IntroductionThere are limited comparative data on catheter ablation of atrial fibrillation (CAAF) using the second-generation cryoballoon (CB-2) versus point-by-point radiofrequency (RF). This study examines the acute/long-term CAAF outcomes using these 2 strategies.
Methods and ResultsIn this multicenter, retrospective, nonrandomized analysis, procedural and clinical outcomes of 1,196 patients (76% with paroxysmal AF) undergoing CAAF using CB-2 (n = 773) and open-irrigated, non-force sensing RF (n = 423) were evaluated. Pulmonary vein isolation was achieved in 98% with CB-2 and 99% with RF (P = 0.168). CB-2 was associated with shorter ablation time (40 14 min vs. 66 +/- 26 min; P < 0.001) and procedure time (145 +/- 49 minutes vs. 188 +/- 42 minutes; P < 0.001), but greater fluoroscopic utilization (29 +/- 13 minutes vs. 23 +/- 14 minutes; P < 0.001). While transient (7.6% vs. 0%; P < 0.001) and persistent (1.2% vs. 0%; P = 0.026) phrenic nerve palsy occurred exclusively with CB-2, other adverse event rates were similar between CB-2 (1.6%) and RF (2.6%); P = 0.207. However, freedom from AF/atrial flutter/tachycardia at 12 months following a single procedure without antiarrhythmic therapy was greater with CB-2 (76.6%) versus RF (60.4%); P < 0.001. While this difference was evident in patients with paroxysmal AF (P < 0.001), it did not reach significance in those with persistent AF (P = 0.089). Additionally, CB-2 was associated with reduced long-term need for antiarrhythmic therapy (16.7% vs. 22.0%; P = 0.024) and repeat ablations (14.6% vs. 24.1%; P < 0.001).
ConclusionIn this multicenter, retrospective, nonrandomized study, CAAF using CB-2 coupled with RF as occasionally required was associated with greater freedom from atrial arrhythmias at 12 months following a single procedure without antiarrhythmic therapy when compared to open-irrigated, non-force sensing RF, alone.

• 出版日期2015-8