Allied Professionals (Non-physician submissions only) -> Clinical Research D-PO06 - Poster Session VI (ID 26) Poster

D-PO06-120 - The Effect Of Displacement Of The Esophagus By Transoesophageal Echocardiography Probe In Cryoablation Of Atiral Fibrillation (ID 677)


Background: Esophageal injury caused by cryoballoon-based PVI is common. Cryoablation guided by transoesophageal echocardiography (TEE) for occlusion of the pulmonary vein (PV) is safe and effective.
Objective: To investigate the protective effect of mechanical displacement of the esophagus by TEE probe in cryoablation of atiral fibrillation (AF).
Methods: 50 patients with paroxysmal AF (PAF) were enrolled in the present study. 25 patients underwent cryoablation without TEE (non-TEE group) and the other 25 with TEE (TEE group) for PV occlusion guidance and displacement of the esophagus. In the TEE group during the procedure, TEE was used to guide the movement of the balloon to achieve PV occlusion. And before freezing, the TEE probe was moved to displace the esophagus away from the PV being freezed to reduce the risk of cryoinjury. All patients underwent esophagogastroscopy within 2 days after the procedure.
Results: There was no significant difference between the TEE group and non-TEE group in regard to the procedure time. The fluoroscopy time (4.1±3.3 min vs. 16.6±6.9 min, P<0.05) and the amount of contrast agent (4.7±5.7ml vs.17.9±3.4 ml, P<0.05) in the TEE group were less than the non-TEE group. The incidence of esophageal injury was significantly lower in TEE group compared with non-TEE group (0 vs. 20%, P<0.05). At a mean of 14.0 months follow-up, success rates were similar between the TEE group and non-TEE group (80.0% vs. 84.0%, P=0.80).
Conclusion: Cryoablation of AF with TEE for protecting the esophagus from cryoinjury is safe and effective. Lower risk of esophageal injury can be achieved with the help of TEE probe movement for mechanical displacement of the esophagus during freezing.