Log in to save activitiesYour saved activities will show here so that you can easily access them whenever you're ready. Log in hereCME & EducationLog in to keep track of your credits.
Please confirm that you would like to log out of Medscape.
If you log out, you will be required to enter your username and password the next time you visit.
Log outCancel
Pulmonary arterial hypertension (PAH) is a rare obstructive disorder of the smallest pulmonary arteries. Progressive narrowing of these arteries increases pulmonary vascular resistance, resulting in right heart failure and death. Early diagnosis and management can improve prognosis, but diagnosis of PAH in the early stages is a clinical challenge because symptoms such as dyspnea, dizziness, and fatigue are nonspecific. PAH is therefore frequently unrecognized until in a relatively advanced stage.