Precapillary Pulmonary hypeension is caused by all Except:

Answer is A (Mitral stenosis) Mitral stenosis is a cause of post-capillary pulmonary hypeension or passive pulmonary hypeension. Causes of pulmonary hypeension: Precapillary pulmonary hypeension Primary pulmonary hypeension Disorders of ventilation Congenital hea disease with pulmonary vascular disease Pulmonary embolism Schistosmiasis Collagen vascular disease Pulmonary vasculitis Sickle hemoglobinopathies Poal hypeension Ingestion of drugs and herbal remedies Passive (Post-capillary) pulmonary hypeension Left ventricular failure Mitral valve disease Cor triatriatum Obstruction of major pulmonary veins Congenital pulmonary vein stenosis Left atrial myxoma or thrombosis Reactive pulmonary hypeension Some patients with mitral valve disease Rarely, other cause of pulmonary venous hypeension, including pulmonary veno-occlusive disease