A 35-year-old male patient with Ebstein's anomaly and previous tricuspid valve repair presented with shortness of breath, fatigue, and palpitations. He was found to have an atrial flutter with a cycle length of 290ms. An echocardiogram and multi-slice computer tomography demonstrated a severely enlarged right atrium. During the electrophysiology procedure, after activation and entrainment mapping, a right atrium cavotricuspid isthmus-dependent atrial flutter was confirmed. Ablation under intracardiac echocardiography control was performed. Tachycardia termination was observed during ablation, and a bidirectional block was proven. After six months of follow-up, the patient is in a stable sinus rhythm. [ABSTRACT FROM AUTHOR]