This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Eisenmenger syndrome–True are A/E – 
Select and explain. 
A. Pulmonary veins are not distended, B. RV & LV walls come back to normal size, C. Dilatation of central pulmonary artery, D. Peripheral pruning of pulmonary arteries
B: RV & LV walls come back to normal size
Answer: B: RV & LV walls come back to normal size 
Explanation: The characteristic pathological pulmonary vascular changes that develop in a patients with Eisenmenger syndrome are confined to arteries only and involve small pulmonary arterioles and muscular arteries (veins are not involved).
There is right ventricular hypertrophy (RV walls do not come back to normal size).
On x-ray there are dilated and prominent central arteries with rapid tapering (pruning) of the peripheral vasculature.