Conclusion
Although the esophageal injury after cryoballoon ablation is rare and reversible, once progressed into AEF, it could be catastrophic. The location between the esophagus and LIPV, the balloon temperature, the freezing duration, LET,obesity can be considered as risk factors. Hence, integral anatomic assessment should be performed, LET monitoring and freezing time and temperature controlling as well as PPI prophylaxis should be carefully deployed with regard for esophageal protection. Furthermore, a high level of suspicion after ablation procedure is necessary so that we could recognize and control the esophageal injury before it is too late.