Aorta–Right Atrial Tunnel in Conjunction With Patent Ductus Arteriosus and Atrial Septal Defect

Congenital aorta–right atrial tunnel (ARAT) is a rare congenital cardiovascular malformation characterized by an abnormal tunnel-like connection between the aorta and the right atrium. Patients with ARAT frequently have other congenital heart malformations and require diagnosis through a variety of imaging examinations. We report a 1-month-old female infant with multiple congenital cardiac malformations who was diagnosed with ARAT using low-dose multislice spiral computed tomography because echocardiography was unclear.