Through what does the infant born with hypoplastic left heart syndrome acquire oxygenated blood?
a. The patent ductus arteriosus
b. A ventricular septal defect
c. The closure of the foramen ovale
d. An atrial septal defect
ANS: D
Because the right side of the heart must take over pumping blood to both the lungs and systemic circulation, the ductus arteriosus must remain open to shunt the oxygenated blood from the lungs.
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