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Primary pulmonary hypertension

From SNPedia

Primary pulmonary hypertension (PPH), also known as pulmonary arterial hypertension (PAH), is high blood pressure in the lungs. It’s a rare lung disorder in which the blood vessels in the lungs narrow and the pressure in the pulmonary artery rises far above normal levels. Pulmonary hypertension is a serious, chronic disease that can lead to heart failure if it’s not treated.JHU

Although the majority of cases of pulmonary hypertension are idiopathic, familial PAH may be caused by mutations in the BMPR2 gene and more rarely the TBX4 gene.