Abnormal heart morphology Abnormality of the vasculature Dextrotransposition of the great arteries 2017-08-27T14:17:00Z D-loop transposition of the great arteries A type of transposition of the great arteries (TGA) in which aorta is in front of and primarily to the right of the pulmonary artery. This is the most common kind of TGA. Fyler:700 D-TGA Fyler:0700