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PH vs. PAH

How is pulmonary hypertension (PH) different from pulmonary arterial hypertension (PAH)?

PH is a general term for any condition in which pressure is too high in the blood vessels of the lungs. There are many types of PH with many different causes. PAH is a rare form of PH that is defined by abnormal changes in the walls of the arteries of the lungs. The treatment for one type of PH may differ from the treatment for another, so it is important for your doctor to know which type you have.