A 4-month-old infant presents with a heart rate of 220 bpm and poor feeding. ECG shows narrow QRS tachycardia. Most likely diagnosis is:

Questions 56

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Question 1 of 9

A 4-month-old infant presents with a heart rate of 220 bpm and poor feeding. ECG shows narrow QRS tachycardia. Most likely diagnosis is:

Correct Answer: B

Rationale: SVT is common in infants with narrow QRS tachycardia, per AHA. A, C-E have different ECG findings.

Question 2 of 9

A parent comments that her adolescent daughter seems to be daydreaming a lot. The nurse understands that this behavior indicates she is:

Correct Answer: D

Rationale: Daydreaming (D) helps adolescents mentally rehearse situations, aiding coping. Boredom (A), fatigue (B), or stress (C) are less specific. Document: 'Daydreaming allows adolescents to act out… [to] prepare for… interactions.'

Question 3 of 9

A 4-month-old infant presents with a heart rate of 220 bpm and poor feeding. ECG shows narrow QRS tachycardia. Most likely diagnosis is:

Correct Answer: B

Rationale: SVT is common in infants with narrow QRS tachycardia, per AHA. A, C-E have different ECG findings.

Question 4 of 9

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

Correct Answer: B

Rationale: CHF features tachypnea and cardiomegaly, per AHA. A, C-E differ in x-ray.

Question 5 of 9

A 5-year-old boy presents with fever and neck stiffness. CSF analysis shows pleocytosis and low glucose. Most likely diagnosis is:

Correct Answer: B

Rationale: Bacterial meningitis features fever, neck stiffness, and CSF with pleocytosis and low glucose, per AAP. A, C-E differ in CSF findings.

Question 6 of 9

A 6-year-old boy presents with fatigue and pallor. Labs show hemoglobin of 7 g/dL and Howell-Jolly bodies. Most likely diagnosis is:

Correct Answer: B

Rationale: Sickle cell disease shows Howell-Jolly bodies, per ASH. A, C-E differ.

Question 7 of 9

Adolescent girl on antineoplastic drugs for cancer requires early preparation for which side effect?

Correct Answer: A

Rationale: Alopecia A is a common, visible side effect requiring psychological prep, per document .

Question 8 of 9

A newborn's failure to pass meconium within the first 24 hours after birth may indicate which of the following?

Correct Answer: A

Rationale: Hirschsprung’s disease (A) causes delayed meconium passage due to absent intestinal motility. Celiac (B) affects absorption later, abdominal defects (C) are structural, and intussusception (D) occurs postnatally. Document: 'Failure to pass meconium… may be an indication of Hirschsprung disease.'

Question 9 of 9

A 3-year-old boy presents with fever and petechiae. Blood culture grows Neisseria meningitidis. The best treatment is:

Correct Answer: B

Rationale: Ceftriaxone treats meningococcemia, per CDC. A, C-E are inadequate.

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