A newborn is severely cyanotic. An echocardiogram reveals transposition of the great arteries. What is the characteristic defect associated with this condition?
a. The pulmonary artery leaving the right ventricle
b. The aorta leaving the right ventricle
c. Ventricular septal defect (VSD)
d. Atrial septal defect (ASD)
ANS: B
In transposition of the great arteries, the pulmonary artery leaves the left ventricle and the aorta exits from the right ventricle. The pulmonary artery normally leaves the right ventricle. Neither VSD nor ASD is associated with transposition of the great arteries.
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