There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.
Abstract
Treatment options for pulmonary arterial hypertension target the prostacyclin, endothelin,
or nitric oxide pathways. Tadalafil, a phosphodiesterase type-5 inhibitor, increases
cGMP, the final mediator in the nitric oxide pathway.