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Pulmonary hypertension is a type of high blood pressure that affects the arteries in your lungs and the right side of your heart.
In one form of pulmonary hypertension, tiny arteries in your lungs, called pulmonary arterioles, and capillaries become narrowed, blocked or destroyed. This makes it harder for blood to flow through your lungs, and raises pressure within your lungs' arteries. As the pressure builds, your heart's lower right chamber (right ventricle) must work harder to pump blood through your lungs, eventually causing your heart muscle to weaken and fail.
The signs and symptoms of pulmonary hypertension in its early stages might not be noticeable for months or even years. As the disease progresses, symptoms become worse.
Pulmonary hypertension symptoms include:
Shortness of breath (dyspnea), initially while exercising and eventually while at rest
Dizziness or fainting spells (syncope)
Chest pressure or pain
Swelling (edema) in your ankles, legs and eventually in your abdomen (ascites)
Bluish color to your lips and skin (cyanosis)
Racing pulse or heart palpitations