Nokea
Pulmonary stenosis
- A. Most common at pulmonary valve level
- B. Valve dilatation done for dysplastic valves
- C. Ejection click occurs in past stenotic dilatation
- D. Surgery done when Rt ventricular pressure exceeds 25 mmHg
Correct Answer: A
Rationale: Pulmonary stenosis is most commonly found at the pulmonary valve level.
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For one of the following, total repair is really achieved, with no requirement for long-term follow-up
- A. atrial septal defects
- B. ventricular septal defects
- C. pulmonic stenosis
- D. uncomplicated isolated pulmonic stenosis
Correct Answer: D
Rationale: Uncomplicated isolated pulmonic stenosis can often be repaired with no need for long-term follow-up.
In embryology:
- A. Most defects occur with teratogens in the first 2 weeks post-conception
- B. The urachus becomes the median umbilical ligament
- C. The mesonephric duct becomes the male organs
- D. The thyroid develops from the floor of the primitive larynx
Correct Answer: B
Rationale: The urachus becomes the median umbilical ligament. Most defects occur after the first 2 weeks, and the thyroid develops from the floor of the pharynx.
The following are transmitted as autosomal dominant traits:
- A. Congenital spherocytosis
- B. Vitamin D-resistant rickets
- C. CAH
- D. Hereditary haemorrhagic telangiectasia
Correct Answer: D
Rationale: Hereditary haemorrhagic telangiectasia is an autosomal dominant disorder. Congenital spherocytosis and Vitamin D-resistant rickets can also be autosomal dominant, but CAH (Congenital Adrenal Hyperplasia) is typically autosomal recessive.
Severe pulmonary valve stenosis is defined as a peak gradient of
- A. >40 mm Hg
- B. >45 mm Hg
- C. >50 mm Hg
- D. >55 mm Hg
Correct Answer: C
Rationale: Severe pulmonary valve stenosis is generally defined as a peak gradient >50 mm Hg.
A diagnosis of primary pulmonary hypertension of the newborn can be made if:
- A. Oxygen saturation in the hand is 80% and in the foot 67%
- B. A tachypnoeic baby has a saturation of 60%
- C. A baby with history of being covered in thick meconium at birth has PaO2 of 4kPa
- D. A septic baby is hypoxic in 100% oxygen
Correct Answer: A
Rationale: A significant difference in oxygen saturation between the upper and lower extremities (e.g., hand 80%, foot 67%) is indicative of persistent pulmonary hypertension of the newborn (PPHN).