 The Radio Frequency Ablation for Atrial Flutter with Magnetic Resonance Guidance and Tracking Pilot Study hereafter referred to as pilot study is a prospective, non- randomized, single-center, pilot study. The purpose of this clinical study is to evaluate the safety and performance of the Imricor Medical Systems, Inc. Imricor Vision Ablation Catheter when used with related accessories for the treatment of type I atrial flutter. The Vision Ablation Catheter and its accessories have been designed for use under fluoroscopic or magnetic resonance guidance. 