I recently had a successful Pulmonary Vein Isolation Cold Catheter Ablation procedure about a month ago to treat atrial fibrillation and immediately began experiencing severe heartburn. I tried stopping all medications to look for improvement but the heartburn persisted. How did this occur, how should it be treated and will it go away on its own? I haven t found anything other than Zantac that will help ease the pain. My Grasto Dr. prescribed omeprazole and I ve been taking Nexium for years, but they are useless to stop this kind of heartburn.