Andrew's Heart Defect

At his twenty week routine ultrasound, Andrew was diagnosed with transposition of the Great Arteries (TGA). At a fetal echo a few weeks later, the diagnosis was confirmed and further found to be simple d-TGA. Simple d-TGA means that Andrew didn't have any other defects (simple) and that the cells that would become his aorta and pulmonary artery twisted to the right instead of the left (d) as they were forming.

I like Mayo Clinic's picture and description of TGA. 

It can be found here: