title: Primary pulmonary hypertension.
mesh_terms: D000293:Adolescent; D000328:Adult; D000792:Angiography; D001344:Autopsy; D006328:Cardiac Catheterization; D005260:Female; D006801:Humans; D006976:Hypertension, Pulmonary / Q000175:diagnosis* / Q000473:pathology; D008875:Middle Aged