USMLE Step 2 Quiz
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PULMONOLOGY
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A 38-year-old woman is diagnosed with WHO Group 1 pulmonary arterial hypertension (idiopathic) via right heart catheterization. Vasoreactivity testing with inhaled nitric oxide during the catheterization was negative. She has symptoms of dyspnea with moderate exertion (WHO functional class III).
Which of the following is an appropriate initial oral therapy for this patient?
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