A 1-month-old infant presents with cyanosis and poor feeding. Echocardiogram shows transposition of the great arteries. The next step is:

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Question 1 of 5

A 1-month-old infant presents with cyanosis and poor feeding. Echocardiogram shows transposition of the great arteries. The next step is:

Correct Answer: C

Rationale: Balloon atrial septostomy stabilizes transposition, per AHA. A-D are secondary.

Question 2 of 5

A 3-month-old infant presents with tachypnea and poor feeding. Chest x-ray shows dextrocardia. Most likely diagnosis is:

Correct Answer: C

Rationale: Dextrocardia with situs inversus fits isolated dextrocardia, per AAP. A, B, D, E differ.

Question 3 of 5

A 3-year-old girl presents with stridor and a barking cough. X-ray shows a steeple sign. Most likely diagnosis is:

Correct Answer: B

Rationale: Croup features barking cough and steeple sign, per AAP. A, C-E differ.

Question 4 of 5

A 5-month-old infant presents with hypotonia and poor head control. EMG shows fasciculations. Most likely diagnosis is:

Correct Answer: B

Rationale: SMA features hypotonia and fasciculations, per NORD. A, C-E differ.

Question 5 of 5

A 2-month-old infant presents with poor feeding and a murmur. Echocardiogram shows coarctation of the aorta. The next step is:

Correct Answer: A

Rationale: Surgery corrects coarctation, per AHA. B-E are temporizing.

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