Background: Catheter ablation of atrial fibrillation is recommended for patients with symptomatic paroxysmal atrial fibrillation (PAF) despite anti-arrhythmic drugs (AADs). Radiofrequency ablation is widely accepted as an effective treatment for PAF. Cryoenergy by cryoballoon technique is an alternative to radiofrequency (RF) ablation. Cryoballoon ablation is safe, and has a similar success rate in comparison to RF ablation. AF recurrence with cryoballoon ablation is roughly 30%. The aim of this study is to determine the predictors of AF recurrence after cryoballoon ablation.