Nokea
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.
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Appropriate investigations in the emergency management of a 4-year-old presenting in a coma:
- A. Serum magnesium level
- B. Throat swabs
- C. Arterial blood gas
- D. CT scan
Correct Answer: C
Rationale: Arterial blood gas analysis is crucial in the emergency management of a comatose child to assess oxygenation, ventilation, and acid-base status.
Tests used in establishing a diagnosis of coeliac disease are:
- A. IgA anti-endomysial antibodies
- B. IgM anti-reticulin antibodies
- C. IgA anti-gliadin antibodies
- D. Duodenal biopsy
Correct Answer: D
Rationale: A duodenal biopsy is the gold standard for diagnosing coeliac disease, as it provides histological confirmation of the disease.
Concerning Ebstein-Barr virus (infectious mononucleosis):
- A. Presence of petechiae between the hard and soft palate supports the diagnosis
- B. Typically a rash following administration of penicillin V occurs
- C. Guillain-Barre syndrome is a recognised sequel
- D. Hepatitis is common
Correct Answer: A
Rationale: Petechiae between the hard and soft palate are a classic sign of infectious mononucleosis. A rash following penicillin V is also common, and Guillain-Barre syndrome is a rare complication.
Which of the following has the highest proportion of etiology of congenital malformations?
- A. Maternal infections
- B. Maternal illness
- C. Environmental agents
- D. Monogenic inheritance
Correct Answer: D
Rationale: Monogenic inheritance accounts for the highest proportion of congenital malformations.
The following are common side effects of sildenafil EXCEPT
- A. flushing
- B. elevated liver function tests
- C. headache
- D. myalgia
Correct Answer: B
Rationale: Elevated liver function tests are not a common side effect of sildenafil.