Exact causes of primary pulmonary hypertension remain unknown. Researchers believe the blood vessels are particularly sensitive to certain internal or external factors, and constrict, or narrow, when exposed to these factors. There may be a genetic factor, an immune system factor, or sensitivity to drugs or other chemicals. The following are the most common symptoms for pulmonary hypertension. However, each individual may experience symptoms differently.
More severe symptoms indicate a more advanced disease.
The symptoms of primary pulmonary hypertension may resemble other conditions or medical problems. Consult your physician for a diagnosis. Pulmonary hypertension is rarely discovered in a routine medical examination, and in its later stages, the signs of the disease can be confused with other conditions affecting the heart and lungs. Pulmonary hypertension is a diagnosis of exclusion. The tests are usually performed with special machines that the person must breathe into.