Tricuspid stenosis causes

Causes of Tricuspid Stenosis
There are at least 4 conditions that are typically attributed with the obstruction of the native tricuspid valve.


 * 1) Rheumatic tricuspid stenosis:
 * 2) * Diffuse thickening of the leaflets occur. Fusion of the commissures may or may not occur.
 * 3) * Chordae tendineae may become thickened and shortened
 * 4) * As a result of the dense collagen and elastic fibers that make up leaflet tissue, the normal leaflet layers become significantly distorted
 * 5) Carcinoid heart disease:
 * 6) * Fibrous white plaques located on the valvular and mural endocardium are characteristic presentations of carcinoid valve lesions
 * 7) * Valve leaflets become thick, rigid and smaller in area
 * 8) * Atrial and ventricular surfaces of the valve structure contain fibrous tissue proliferation
 * 9) Congenital tricuspid stenosis:
 * 10) * More common in infants
 * 11) * Lesions may present in a number of different ways, either singularly or in any combination of the following:
 * 12) ** Incompletely developed leaflets
 * 13) ** Shortened or malformed chordae
 * 14) ** Small annuli
 * 15) ** Papillary muscles of abnormal size and number
 * 16) Infective endocarditis:
 * 17) * Stenosis may develop as a result of large infected vegetation obstructing the opening of the tricuspid valve
 * 18) * This condition is uncommon


 * Unusual and rare causes:
 * Fabry disease
 * Giant blood cysts


 * Other conditions may mimic tricuspid stenosis, obstructing flow through the valve:
 * Supravalvular obstruction from congenital diaphragms
 * Intracardiac or extracardiac tumors
 * Thrombosis or emboli
 * Large endocarditis vegetations
 * Other conditions that impair right-sided filling
 * Constrictive pericarditis
 * Restrictive Cardiomyopathy