The Amplatzer duct occluder (ADO) (AGA Medical Corp., Golden Valley, MN) is designed to meet criteria for an optimal transcatheter technique for closure of a patent ductus arteriosus. It was developed as an alternative to surgical closure and other interventional techniques. It is not technically complex, allows controlled deployment, is retrievable and repositionable, and has a low risk of embolization. The ADO also has very high complete closure rate at 1-month follow-up comparable to surgical ligation and division.