narrowing of the mitral valve, the function of which is to permit blood to flow from the atrium, or upper chamber, to the ventricle, or lower ... [3 related articles]
<cardiology> A congenital or acquired heart valve abnormality that describes the narrowing and ineffective opening of the mitral valve. ... (13 Nov 1997) ... 
a narrowing of the mitral valve due to inflammation and scarring; the cause is almost always rheumatic heart disease. Normally the leaflets open with each pulsation of the heart, allowing blood to flow from the left atrium into the left ventricle; the leaflets close as the ventricle becomes full, so that they prevent a backward...
A narrowing of the mitral heart valve (usually due to rheumatic fever)
(MS) Type: Term Definitions: 1. pathologic narrowing of the orifice of the mitral valve.
[n] - obstruction or narrowing of the mitral valve (as by scarring from rheumatic fever)
a condition in which the mitral valve in the heart becomes narrowed, making the heart work harder to pump blood; can lead to symptoms such as shortness of breath 
mitral valve stenosis noun obstruction or narrowing of the mitral valve (as by scarring from rheumatic fever)
A narrowing of the mitral valve, which controls blood flow from the hearts upper left chamber to its lower left chamber. May result from an inherited (congenital) problem or from rheumatic fever.