Near zero fluoroscopy radiation exposure during successful catheter ablation of atrial tachycardia from the non-coronary aortic cusp using 3-dimentional electroanatomic mapping system

Atrial tachycardia (AT) rarely originates from the paraHisian region (1). Catheter ablation of paraHisian AT carries a substantial risk of atrioventricular (AV) block. Cryoablation offers a safer ablation strategy for these patients (2). There is a small risk of AV block with cryoablation. Ablation of paraHisian AT from the non-coronary aortic cusp (NCC) is an option in these patients. We report a patient with paraHisian AT that was successfully ablated from the NCC by 3-Dimentional (3-D) mapping system with using near zero fluoroscopy (NZF).