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Which of the Following Events Causes Cessation of Right-To-Left Shunt

Question 1

Multiple Choice

Which of the following events causes cessation of right-to-left shunt through the foramen ovale?


A) Increased levels of PO2 in the blood of the neonate
B) Decreased levels of PCO2 in the blood of the newborn
C) Increased systemic vascular resistance
D) Removal of the placenta, causing lowered blood volume returning to the right side of the fetal heart

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