The treatment targets for pulmonary arterial hypertension (PAH) continue to evolve. Recent advances have expanded therapeutic targets beyond the conventional endothelin, nitric oxide, and prostacyclin pathways to include the activin-bone morphogenetic protein receptor type II BMPR-II signaling axis. These novel disease-modifying approaches aim to improve exercise capacity and reduce the risk of clinical worsening. Test your knowledge with this quick question on contemporary PAH management!

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