Moderate MS (MVA) is defined as MVA in the range of which values?

Moderate MS (MVA) is defined as MVA in the range of which values?

• A. >1.5 cm2
• B. <1.0 cm2
• C. 1.0-1.5 cm2
• D. 0.75-1.25 cm2

Answer: (C)

Mitral stenosis severity is judged by how much the mitral valve area is reduced. Normal valve area is about 4–6 cm^2; as the orifice narrows, flow becomes more restricted and left atrial pressures rise. Moderate mitral stenosis corresponds to a valve area of roughly 1.0–1.5 cm^2. Values above this range are considered mild, while values below are severe. A range like 0.75–1.25 cm^2 isn’t used because it spans multiple severity categories, not the standard moderate band.

Mitral stenosis severity is judged by how much the mitral valve area is reduced. Normal valve area is about 4–6 cm^2; as the orifice narrows, flow becomes more restricted and left atrial pressures rise. Moderate mitral stenosis corresponds to a valve area of roughly 1.0–1.5 cm^2. Values above this range are considered mild, while values below are severe. A range like 0.75–1.25 cm^2 isn’t used because it spans multiple severity categories, not the standard moderate band.