Pulmonary artery reconstruction is frequently needed during surgery for congenital heart disease. Exposure of the main pulmonary artery and its branches is difficult if they are hypoplastic with a large anteriorly placed aorta. In redo operations, adhesions make this not only technically difficult, but also prone to bleeding. We electively transected the ascending aorta in 36 patients to facilitate pulmonary artery exposure, without complications or significant prolongation of cross clamp time.