It may be inherited
Up to 5% of patients with pulmonary arterial hypertension (pah) may have a genetic or heritable cause.
Research studies have identified a genetic abnormality affecting bone morphogenetic protein
receptor 2 (bmpr2) that appears to predispose a patient to pah. Fortunately, even if an individual inherits the abnormal gene, the likelihood of developing pah is only 1 in 5.