Which of the following malformations are parts of Ebstein anomaly?
  1. Massively enlarged right atria
  2. Malformation of septal and posterior leaflet of tricuspid valve
  3. Mitral stenosis
  4. Interatrial communication and tricuspid regurgitation
Explanation
Answer: B - Ebstein anomaly is a congenital malformation of the septal and posterior leaflets of the tricuspid valve, both of which are displaced into the RV. The right atrium is enlarged and an interatrial communication and tricuspid regurgitation usually exist.
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