Pulmonary Hypertension, Primary, 1, also known as pulmonary arterial hypertension, is related to pulmonary arterial hypertension associated with congenital heart disease and heritable pulmonary arterial hypertension, and has symptoms including dyspnea An important gene associated with Pulmonary Hypertension, Primary, 1 is BMPR2 (Bone Morphogenetic Protein Receptor Type 2), and among its related pathways/superpathways are Signaling by BMP and ALK1 signaling events. The drugs Oxymetazoline and Phenylephrine have been mentioned in the context of this disorder. Affiliated tissues include heart and lung, and related phenotypes are right ventricular hypertrophy and increased pulmonary vascular resistance