Successful Catheter Ablation of Atrial Tachycardia Originating Near the Atrioventricular Node from the Noncoronary Sinus of Valsalva

This report describes a patient who underwent RF catheter ablation of atrial tachycardia. Two applications of RF energy near the His‐bundle region transiently terminated the tachycardia. With detailed mapping at the aortic sinus of Valsalva using a retrograde transaortic approach, the earliest atrial activation was found in the noncoronary sinus of Valsalva. Complete elimination of the tachycardia was achieved with RF energy application from this site.