Abstract
Aortopulmonary window (APW) is a septation defect between the ascending aorta and main pulmonary artery, and it accounts for 0.2-0.6% of all congenital heart diseases. The diagnosis is made by detecting the defect between the ascending aorta and pulmonary artery while both semilunar valves are fully developed. Based on the anatomical characteristics, APW is classified into four types: proximal (Type 1) defect, distal (Type 2) defect, total (Type 3) defect and intermediate (Type 4) defect. APW is traditionally treated by surgery, and there are a few reports about transcatheter APW closure in infancy. Only defects with adequate superior and inferior rims can be considered for device closure. We describe two cases who underwent transcatheter APW closure with the Amplatzer duct occluder-I (ADO-I). Our experience shows that the ADO-I can achieve good results in closure of APW for selected patients.