Classification criteria for mitral stenosis

Mitral stenosis is classified according to the area of mitral valve orifice, including mild stenosis, moderate stenosis and severe stenosis.

1. Mild

stenosis refers to the area of mitral valve orifice in 1.5-2.0c㎡, and symptoms generally occur after strenuous exercise and excessive emotional agitation.

2. Moderate stenosis

refers to the area of mitral valve orifice in 1.0-1.5c㎡, and symptoms usually occur during physical activity.

3. Severe

stenosis refers to the area of mitral valve orifice in