Transposition of the Great Arteries
is a problem with the hallways coming out of the heart.
In a normal heart the Aortic
hallway originates from the Left Ventricle and carries pink blood
(with oxygen) from the Left Ventricle to the body. When
this defect is present the Aortic hallway originates from Right
Ventricle and therefore carries blue blood (no oxygen)
to the body.