Ebstein's anomaly not associated with pulmonary stenosis.

• A. Pulmonary stenosis
• B. Tricuspid regurgitation
• C. Atrial septal defect
• D. Right atrial enlargement

Answer: (A)

The key idea is that Ebstein's anomaly mainly involves the tricuspid valve being displaced downward into the right ventricle, creating an atrialized portion of the ventricle. This disruption causes heavy tricuspid regurgitation and a very enlarged right atrium. Because the right atrium bears the brunt of the abnormal inflow, an interatrial communication like an atrial septal defect is commonly seen to accommodate pressures and volumes.

Pulmonary stenosis, on the other hand, is not a typical feature of Ebstein's anomaly. The problem lies with the tricuspid valve and the right-heart inflow chamber, not with the outflow tract to the pulmonary artery. Therefore, pulmonary stenosis is not associated with Ebstein's anomaly.