Catheter ablation has emerged as a practical approach for treatment of symptomatic atrial fibrillation (AF) in those who fail membrane-stabilizing antiarrhythmic drug (AAD) therapy¹. AF ablation has been shown to improve patient quality of life² and reduce hospital readmission³. Additionally, the observed benefits even persist in patients in whom complete freedom from AF cannot be achieved². As the role for catheter ablation in the management of AF has evolved within the last 2 decades, so have the ablative techniques and strategies. To date, a variety of energy modalities have been utilized for catheter ablation of AF including unipolar radiofrequency (RF)⁴, irrigated⁵ and non-irrigated bipolar RF⁶, laser⁷, cryothermy⁸, and high-intensity focused ultrasound⁹. While the long-term safety and efficacy of RF energy has rendered it the mainstay of arrhythmia ablation therapy, there are certain practical and theoretical advantages to using cryoenergy.