realized in has material basis at all times has occurrent part disturbed anterograd blood flow through mitral valve during left ventricular diastole mitral valve disorder mitral valve narrowed opening during left ventricular diastole mitral valve stenosis SNOMEDCT_2010_1_31:155277002 MSH:D008946 UMLS_CUI:C0026269 mitral valve stenosis SNOMEDCT_2010_1_31:194725005 NCI:C50654 Mitral valve stenosis is a rheumatic disease of mitral valve characterized by the narrowing of the orifice of the mitral valve of the heart. Most cases of mitral stenosis are due to disease in the heart secondary to rheumatic fever and the consequent rheumatic heart disease. Less common causes of mitral stenosis are calcification of the mitral valve leaflets, and as a form of congenital heart disease. However, there are primary causes of mitral stenosis that emanate from a cleft mitral valve. Other causes include Bacterial endocarditis where the vegetations may favor increase risk of stenosis. Mitral valve stenosis (disorder) SNOMEDCT_2010_1_31:79619009 Mitral stenosis NOS Mitral stenosis A disease in which some disorder of a mitral valve prevents it from opening properly during left ventricular diastole, occasioning disturbance in the anterograd blood flow through the valve. DOID:1754 disease_ontology disease disease course