<unk>  is a valvular heart disease that narrows the opening of the heart's<unk>  valve. It is a relatively rare condition that causes<unk> -increased restriction of blood flow through the valve.
Tricuspid valve stenosis
Pulmonary valve stenosis
Tricuspid regurgitation
Mitral stenosis
Pulmonary vein stenosis
Supravalvular aortic stenosis
Aortic regurgitation
Pulmonic stenosis