Mitral valve stenosis is best described as:

Mitral valve stenosis is best described as:

• A. A narrowed mitral valve that blocks blood flow into the left ventricle, often caused by infection, calcification, or genetics.
• B. A narrowed mitral valve that blocks blood flow from the left ventricle to the left atrium.
• C. A valve that leaks back into the left atrium.
• D. A mitral valve that cannot open due to papillary muscle rupture.

Answer: (A)

Mitral stenosis involves a narrowing of the mitral valve, which impedes blood flow from the left atrium into the left ventricle during diastole. This obstruction raises left atrial pressure and can lead to pulmonary congestion and related symptoms. The best description is a narrowed mitral valve that blocks blood flow into the left ventricle, with common causes including rheumatic disease following a streptococcal infection, calcification, or congenital factors. The other scenarios describe different problems: one describes blockage of the flow in the opposite direction (from left ventricle to left atrium), which is mitral regurgitation; another mentions a valve that leaks back into the atrium (also regurgitation); and the last describes rupture of the papillary muscle leading to acute MR, not stenosis.

Mitral stenosis involves a narrowing of the mitral valve, which impedes blood flow from the left atrium into the left ventricle during diastole. This obstruction raises left atrial pressure and can lead to pulmonary congestion and related symptoms. The best description is a narrowed mitral valve that blocks blood flow into the left ventricle, with common causes including rheumatic disease following a streptococcal infection, calcification, or congenital factors. The other scenarios describe different problems: one describes blockage of the flow in the opposite direction (from left ventricle to left atrium), which is mitral regurgitation; another mentions a valve that leaks back into the atrium (also regurgitation); and the last describes rupture of the papillary muscle leading to acute MR, not stenosis.