All the following are possible cardiac complications at the acute stage of Kawasaki disease (KD) EXCEPT

Correct Answer: D

Rationale: Cardiogenic shock is more common in later stages of KD.

Correct Answer: D

Rationale: Vitamin A deficiency is not associated with a large anterior fontanel. The other conditions listed can cause delayed fontanel closure or enlargement.

Correct Answer: B

Rationale: Prematurity is the leading cause of low birthweight in the United States

Correct Answer: B

Rationale: Prostaglandin E1 maintains the patency of the ductus arteriosus, allowing blood to bypass obstructed or underdeveloped pulmonary circulation, improving oxygenation in cyanotic congenital heart diseases like pulmonary atresia or transposition of the great arteries.

Correct Answer: C

Rationale: Histamine is a primary mediator released from mast cells during allergic reactions.