Moderate MS mean gradient falls in which range?

Moderate MS mean gradient falls in which range?

• A. 0-4 mmHg
• B. 10-15 mmHg
• C. 5-10 mmHg
• D. >15 mmHg

Answer: (C)

Mitral stenosis severity is reflected by the mean transmitral gradient—the pressure difference between the left atrium and left ventricle during diastole as blood flows across the narrowed valve. As the valve area decreases, the gradient increases because the flow encounters more resistance. Moderate stenosis sits between mild and severe, typically producing a mean gradient in the 5–10 mmHg range. The gradient can be affected by flow: higher cardiac output can raise the gradient even if the stenosis is not dramatically worse, while low output can lower it. Therefore, the mean gradient most commonly associated with moderate MS is 5–10 mmHg.

Mitral stenosis severity is reflected by the mean transmitral gradient—the pressure difference between the left atrium and left ventricle during diastole as blood flows across the narrowed valve. As the valve area decreases, the gradient increases because the flow encounters more resistance. Moderate stenosis sits between mild and severe, typically producing a mean gradient in the 5–10 mmHg range. The gradient can be affected by flow: higher cardiac output can raise the gradient even if the stenosis is not dramatically worse, while low output can lower it. Therefore, the mean gradient most commonly associated with moderate MS is 5–10 mmHg.