Transposition of great arteries (medical condition)

A congenital malformation where the aorta and pulmonary artery are transposed which causes oxygenated blood from the lungs to be sent back to the lungs and de-oxygenated blood to be sent to body tissues. Often there is some other defect such as an opening in the heart chambers which allows mixing of the blood and hence survival is possible for a short while at least. See also Transposition of great arteries