Pulmonary arterial hypertension is a progressive disease of the lung vascular system, primarily affecting the small pulmonary arterioles. Pulmonary arterial hypertension is defined as mean pulmonary artery pressure greater than 25 mm Hg measured during right heart catheterization. The term Pulmonary arterial hypertension describes a subset of patients who also have the presence of pre-capillary hypertension, including an end-expiratory pulmonary artery wedge pressure (less than 15 mm Hg) and a pulmonary vascular resistance greater than 3 Woods units. At present, there is no permanent cure for Pulmonary arterial hypertension. But several new potential developments in t...
