Pulmonary hypertension ( PH ) is an increase of blood pressure in the pulmonary artery , pulmonary vein , or pulmonary capillaries , together known as the lung vasculature , leading to shortness of breath , dizziness , fainting , leg swelling and other symptoms .
In medicine , pulmonary hypertension ( PH ) is an increase in blood pressure in the pulmonary artery or lung vasculature , leading to shortness of breath , dizziness , fainting , and other symptoms , all of which are exacerbated by exertion .