Causes may include:
- a genetic defect
- certain diet medications
- history of a blood clot in the lung
- lung or heart valve disease
- obstructive sleep apnea
In some cases, the cause is unknown. If it occurs without a known cause, it is called primary pulmonary hypertension. If it is caused by a medicine or medical condition, it is called secondary pulmonary hypertension. Primary pulmonary hypertension is rare.
There is no known cure. The goal of treatment is to control symptoms.
Treatment may include: