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Glossary

Terms

P


Phosphodiesterase inhibitors
A class of medications used to treat PAH that act as vasodilators
Pneumonia
An infection in the lung, typically causing fever, cough, and phlegm
Polysomnography
Also known as a sleep test; a test during which various parameters such as oxygenation, breathing, heart rhythm, brain waves, blood pressure are measured while you sleep.
Prostacyclin
A group of molecules naturally found in the body with various functions including vasodilation, inhibition of platelet aggregation and smooth muscle proliferation; synthetic prostacyclins are used to treat PAH.
Prostacyclin analogue
A synthetic chemical that acts in the same way that natural prostacyclins do.
Pulmonary arterial pressure
The blood pressure in your pulmonary arteries
Pulmonary arteries and veins
Blood vessels in the lungs that carry blood to (arteries) and away (veins) from the lungs
Pulmonary embolus
(pl. = emboli) a blood clot in one or more pulmonary arteries that arises somewhere else in the body and travels to the lungs; usually forms in the deep veins of the legs and travels up to the pulmonary arteries
Pulmonary function tests (PFTs)
A series of breathing tests that allow measurement of your lung function, including lung capacity, how fast you can expel air from your lungs, and how well your lungs exchange gases.
Pulmonary hypertension
Elevated blood pressure in the pulmonary arteries
Pulmonary valve
A valve in the heart that separates the right ventricle from the pulmonary arteries preventing blood from flowing backwards into the right ventricle
Pulmonologist
A doctor who is specially trained in diseases of the lungs and breathing