Fig. 1

(a) Preoperative computed tomography. Preoperative computed tomography image showed aortopulmonary window. (b) Intraoperative findings. The aortopulmonary artery was dissected between the aorta and pulmonary artery. The dissection on the aortic side was sandwiched between two felts and directly closed with 4-0 Prolene sutures. In contrast, dissection on the pulmonary artery side was closed directly with 5-0 Prolene sutures

Ao: aorta, MPA: main pulmonary artery