Asthma USMLE Step 1 Practice Question
A 35-year-old woman has progressive exertional dyspnea, fatigue, and one episode of syncope while climbing stairs. Examination shows a loud P2 and signs of right ventricular strain. Right heart catheterization shows mean pulmonary artery pressure 32 mm Hg, elevated pulmonary vascular resistance, and normal pulmonary capillary wedge pressure. Which of the following medications directly antagonizes endothelin mediated vasoconstriction in this condition?
Answer choices
- ABosentanCorrect answer
- BFluticasone
- CMontelukast
- DIpratropium
- ERoflumilast
- FSildenafil
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