Reviewed by Poonam Sachdev on February 18, 2022
Sources
Pulmonary Hypertension Association: "About Pulmonary Hypertension."<br/> Mayo Clinic: "Pulmonary Hypertension."<br/> American Lung Society: "Learn About Pulmonary Arterial Hypertension."
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Pulmonary arterial hypertension (PAH) happens when you have high blood pressure in the blood vessels that carry blood from your heart to your lungs.