Idiopathic/heritable Pulmonary Arterial Hypertension, also known as idiopathic and/or familial pulmonary arterial hypertension, is related to hypertension, essential and pulmonary hypertension, primary, 1. An important gene associated with Idiopathic/heritable Pulmonary Arterial Hypertension is BMPR2 (Bone Morphogenetic Protein Receptor Type 2). Affiliated tissues include heart and lung, and related phenotypes are pulmonary arterial hypertension and dyspnea