Figure 4 Angio-CT images. (A) Axial view reproducing the echo parasternal short axis view shown in figure 3, butterfly sign is also visible *. (B, C and D) Oblique views, showing a type A interrupted aortic arch and aortopulmonary window. AAo, ascending aorta; DAo, descending aorta; LPA, left pulmonary artery; PDA, patent ductus arteriosus; PT, pulmonary trunk.