Tricuspid stenosis (TS) refers to narrowing of the tricuspid valve. It is an uncommon condition and is different to tricuspid hypoplasia where in the latter, the right ventricle also often tends to be hypoplastic.
Tricuspid stenosis most commonly occurs in the setting of rheumatic heart disease, in which cases other valves (e.g. mitral valve) are almost always involved, the majority of these have concurrent tricuspid regurgitation.
A significant stenosis often signified by a mean forward gradient across the valve >5 mm Hg ref required.
If it occurs in isolation, suspicion should be made of a valve lesion:
Other rare associations include:
Two-dimensional echocardiography may demonstrate:
- thickened tricuspid valve leaflets
- reduced tricuspid valve movement
- evidence of right atrial enlargement
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