Is a rare form of high blood pressure. It occurs in the pulmonary arteries that flow from your heart and through your lungs. Constricted and narrowed arteries prevent your heart from pumping adequate blood.
Symptoms:
Shortness of breath (dyspnea), initially while exercising and eventually while at rest
Fatigue
Dizziness or fainting spells (syncope)
Chest pressure or pain
Swelling (edema) in your ankles, legs and eventually in your abdomen (ascites)