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Idiopathic "/or" familial pulmonary arterial hypertension
- ... known family history of the disorder. These non-familial cases are described as idiopathic pulmonary arterial hypertension. About 20 percent of these cases are caused ...
- ... in the blood vessels that supply the lungs (pulmonary hypertension). Most ... one person in a family. These cases are described as sporadic. However, a ...