Atrial fibrillation is the most common arrhythmia we see in patients. Its treatment usually involves medications and blood thinners. Additionally, some patients are candidates for a special ablation procedure where a part of left upper chamber of the heart is electrically isolated from the rest of the heart. This involves catheters introduced into the heart through the veins of the groin that apply heat/cold and cauterize a part of the left upper chamber to try and separate the diseased areas from the heart that often leads to this arrhythmia.