In the case Steidele described, the infant had a type A interrupted aortic arch, and survived only for "a few hours." In homage to the discoverer, the terminology of "Steidele's complex" has been used to describe an interrupted aortic arch. The first type B interrupted aortic arch was reported by Seidel in 1818, and the first type C was reported by Weisman and Kesten in 1948. The classification system (Types A, B, and C) were defined by Celoria and Patton in 1959. The first successful repair of a Type A interrupted aortic arch was reported in 1961, in which the left subclavian artery was grafted into the descending thoracic aorta in a 14-year-old male patient. The first successful repair of a Type A interrupted aortic arch in an infant was in a 12-day-old infant in 1969, in which the left subclavian artery was connected to the descending thoracic aorta, the patent ductus arteriosus was closed, and the main pulmonary artery was banded. The first successful repair of a Type B interrupted aortic arch was in 1954, in which the 16 year-old, female patient's own aorta was grafted from the arch to the descending thoracic aorta and the left subclavian artery was ligated. The first successful repair on a type B interrupted aortic arch in an infant was in 1973, in which a vein was used to connect the ascending aorta and the descending aorta. The first successful repair of a Type C interrupted aortic arch was in 1964, in which the 16-year-old female patient's ascending aorta was grafted to the descending thoracic aorta. As of 1984, there had been no successful repairs on infants under one year old. The use of PGE1 dramatically improved the mortality rate after its introduction in 1976. While PGE1 is the standard of care for maintaining the ductus arteriosus, there is insufficient data on the proper dose, duration of therapy, safety, and long-term consequences of PGE1 on infants with ductal-dependent congenital heart defects (like interrupted aortic arch).