label: pulmonary veno-occlusive disease and/or pulmonary capillary haemangiomatosis
label_lc: pulmonary veno-occlusive disease and/or pulmonary capillary haemangiomatosis
description: "A rare subgroup of pulmonary arterial hypertension (PAH) characterized by obliterative fibrosis of the small pulmonary veins and venules and/or capillary infiltration of the pulmonary interstitium leading to increased pulmonary vascular resistance and right ventricular dysfunction."