What Causes Tricuspid Stenosis

Tricuspid valve acts as a divider between right atrium and right ventricle and is situated on the right of the heart. When the blood passes, right atrium becomes narrow thereby opening tricuspid valve and allowing the blood to reach right ventricle. Tricuspid stenosis is caused when the right atrium becomes large and thickened because of the extra work of pumping that heart has to do thereby narrowing heart valve. Congenital heart disease and rheumatic fever both are responsible in developing tricuspid stenosis. Congenital tricuspid stenosis mainly affects infants which can lead to development of shortened chordae and abnormality of papillary muscles. Carcinoid heart disease is also responsible in development of tricuspid stenosis and this may result in the formation of white plaques which gets accumulated on mural and valvular endocardium. Infective endocarditis in which infected vegetations blocks the tricuspid valve thereby resulting in the development of tricuspid valve stenosis is also one cause for this defect.

Flow of blood through tricuspid valve is obstructed by conditions such as thrombosis, congenital diaphragms, emboli and tumors resulting in the development of tricuspid stenosis. Fabry disease or giant blood cysts are also responsible for developing tricuspid stenosis. Lupus erythematosus, endomyocardial fibrosis and right atrial myxoma are other causes responsible for developing tricuspid valve stenosis.

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