Which of the following arc true regarding transposition of the great arteries (TGA)?
a) In the D loop of TGA, the atria and ventricles have a normal morphological relationship
b) Pulmonary stenosis is an associated feature
c) Chest radiograph shows pulmonary plethora in the D loop of TGA
d) In the L loop (corrected) transposition, there is a physiologically corrected circulation
e) Dextrocardia is associated with the L loop of TGA
a) In the D loop of TGA, the atria and ventricles have a normal morphological relationship.
In the D loop (or D-TGA), the atria and ventricles are normally connected, but the aorta and pulmonary artery are switched, resulting in a parallel circulation where the systemic and pulmonary circulations are separate.
d) In the L loop (corrected) transposition, there is a physiologically corrected circulation.
In L loop (or L-TGA), also known as corrected transposition, the atrioventricular and ventriculoarterial connections are both switched, resulting in a physiologically corrected circulation, where the systemic and pulmonary circulations are appropriately linked but through an abnormal anatomical configuration.