Nokea
All the following are signs of coarctation of the aorta EXCEPT
- A. femoral pulses are weak or absent
- B. bounding pulses of the arms
- C. blood pressure in the legs is lower than that in the arms
- D. precordial impulse and heart sounds are usually normal
Correct Answer: B
Rationale: In coarctation of the aorta, femoral pulses are delayed or absent, not bounding.
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Avascular necrosis of the femoral head is associated with:
- A. Sickle cell trait
- B. Nephrotic syndrome
- C. Cushing's syndrome
- D. Hypothyroidism
Correct Answer: C
Rationale: Cushing's syndrome is associated with avascular necrosis due to steroid use. Sickle cell trait, nephrotic syndrome, and hypothyroidism are not directly linked.
Tall (>25 mm), narrow, and spiked P waves are seen in
- A. Ebstein anomaly
- B. ventricular septal defect
- C. patent ductus arteriosus
- D. severe mitral stenosis
Correct Answer: D
Rationale: Severe mitral stenosis can cause tall, narrow, and spiked P waves due to left atrial enlargement.
Drugs to be avoided in renal failure include:
- A. Allopurinol
- B. Digoxin
- C. Ceftazidime
- D. Acyclovir
Correct Answer: B
Rationale: Digoxin is avoided in renal failure due to its narrow therapeutic index and renal excretion, which can lead to toxicity.
Which are the most serious complications for a child with Kawasaki disease? Select all that apply.
- A. Coronary thrombosis
- B. Hypocoagulability
- C. Decreased sedimentation time (ESR)
- D. Coronary stenosis
Correct Answer: A
Rationale: The most serious complications of Kawasaki disease involve the coronary arteries, including thrombosis, stenosis, and aneurysms, which can lead to significant cardiac issues.
How much bilirubin can be bound to 1 gm of albumin?
- A. 8.5 mg
- B. 9.8 mg
- C. 10.5 mg
- D. 13.6 mg
Correct Answer: A
Rationale: 1 gram of albumin can bind approximately 8.5 mg of bilirubin, which is important in managing neonatal jaundice.