If the Mitral Valve Area is 0.9 cm2, what is the MS severity?

If the Mitral Valve Area is 0.9 cm2, what is the MS severity?

• A. Mild
• B. Moderate
• C. Severe
• D. Indeterminate

Answer: (C)

Mitral stenosis severity is determined by the valve area. Normal mitral valve area is about 4–6 cm². Mild stenosis is typically >1.5 cm², moderate 1.0–1.5 cm², and severe <1.0 cm². An area of 0.9 cm² falls just below 1.0 cm², which places it in the severe category. A small orifice markedly increases diastolic flow resistance, elevates left atrial pressure, and can lead to symptoms like dyspnea and possible pulmonary hypertension. Therefore, the severity is severe.

Mitral stenosis severity is determined by the valve area. Normal mitral valve area is about 4–6 cm². Mild stenosis is typically >1.5 cm², moderate 1.0–1.5 cm², and severe <1.0 cm². An area of 0.9 cm² falls just below 1.0 cm², which places it in the severe category. A small orifice markedly increases diastolic flow resistance, elevates left atrial pressure, and can lead to symptoms like dyspnea and possible pulmonary hypertension. Therefore, the severity is severe.