The goal of radiofrequency ablation (RFA), a procedure done by specialized Electrophysiology (EP) cardiologists in a heart catheterization lab, is to prevent atrial fibrillation from occurring entirely. There are different varieties of the technique, which generally involve a catheter which makes small burns on the inner surface of the heart. Some attempt to electically isolate parts of the heart which are notorious for emanating aberrant signals that lead to afib. These are known as pulmonary vein isolation, or PVI. Others focus on finding and burning parts of the heart that are currently releasing abnormal signals.