Question: What are the causes of pulmonary hypertension?
Answer: There are numerous causes of pulmonary hypertension. In newborn infants, pulmonary hypertension can result from increased pulmonary blood flow (atrial and ventricular septal defects, patent ductus arteriosus) and in adults, from mitral stenosis, left ventricular failure, multiple pulmonary thromboemboli, chronic hypoxia, emphysema, interstitial fibrosis and pulmonary veno-occlusive disease. In addition, some cases of pulmonary hypertension are idiopathic. In general, increased pulmonary blood flow, chronic venous congestion, obstruction of major arteries, hypoxia or destruction of the pulmonary capillary bed can lead to pulmonary hypertension.