What does "transposition of the great arteries" mean?

TGA: Tga refers to a type of congenital heart disease in which the aorta is connected to the right ventricle (instead of the left ventricle) and the pulmonary artery is connected to the left ventricle (instead of the right ventricle). This heart defect usually requires surgical repair within the first several days to weeks of life.

TGA: Ventriculo arterial discordance with or without atrioventricular concordance in simple words. In d transposition the aorta arises from the morphologic right ventricle and the pulmonary artery from the morphologic left ventricle. Unless there is a large enough atrial septal defect the baby won't survive to surgery. In congenitally corrected d-transposition, there is atrioventricular discordance