Fig. 2

Transthoracic echocardiography demonstrated a severely dilated aorta and main pulmonary artery with a large intervening defect (a, b). Distal to the APW, the ascending aorta gave rise to the right pulmonary artery (a, b). Computed tomography showed a type III APW and an AORPA (c). Three-dimensional computed tomography revealed a dilated aortic sac, IAA, and the descending aorta formed via a PDA (d). AORPA, aortic origin of the right pulmonary artery; APW, aortopulmonary window; PDA, patent ductus arteriosus; IAA, interruption of the aortic arch