Congenitally corrected transposition of the great arteries (ccTGA)

Congenitally corrected transposition of the great arteries (CCTGA) is a rare heart defect in which the heart’s lower half is reversed. It is also called L-TGA. It is different from and much less common than “regular” transposition of the great arteries (TGA or D-TGA). To understand CCTGA, it helps to first understand how a normal heart works.