Nokea
What are the FOUR mechanisms for LV outflow tract obstruction in AVSD?
- A. Gooseneck
- B. Subaortic fibromuscular ridge
- C. Septal hypertrophy
- D. Abnormal LAVV chordal attachments
Correct Answer: B
Rationale: The subaortic fibromuscular ridge is a common cause of LV outflow tract obstruction in AVSD, affecting the smooth flow of blood.
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In childhood, hypokalaemic alkalosis is a recognised finding:
- A. In a baby given feeds that are too concentrated
- B. In congenital pyloric stenosis
- C. In cystic fibrosis
- D. Following urinary diversion
Correct Answer: B
Rationale: Hypokalaemic alkalosis is a hallmark of congenital pyloric stenosis due to vomiting. It is not typically associated with concentrated feeds, cystic fibrosis, or urinary diversion.
Blunt or shallow Y descent in jugular venous waveform is seen in all, except
- A. Tricuspid stenosis
- B. Cardiac tamponade
- C. Effusive-constrictive pericarditis
- D. Ebstein's anomaly
Correct Answer: D
Rationale: Ebstein's anomaly is not typically associated with a blunt or shallow Y descent in the jugular venous waveform.
Measuring serum potassium is essential in a child with confirmed hypertension because hyperkalemia may be seen in
- A. Liddle syndrome
- B. Gordon syndrome
- C. glucocorticoid remediable aldosteronism
- D. apparent mineralocorticoid excess
Correct Answer: D
Rationale: Hyperkalemia is not typically associated with Liddle syndrome, which causes hypokalemia.
Methaemoglobinaemia may occur as a result of ingestion or exposure to:
- A. Paraquat
- B. Methylene blue
- C. Potassium permanganate
- D. Nitrates
Correct Answer: D
Rationale: Nitrates, when ingested, can lead to methaemoglobinaemia by converting hemoglobin to methemoglobin, impairing oxygen delivery.
Complications of an infant of a diabetic mother include:
- A. Hypoglycaemia
- B. Hypocalcaemia
- C. Hyperinsulinaemia
- D. Jaundice
Correct Answer: A
Rationale: Infants of diabetic mothers are at risk of hypoglycemia due to maternal hyperglycemia leading to fetal hyperinsulinemia, which persists after birth.