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| Parameters of severity | Mild | Moderate | Severe |
|---|---|---|---|
| Two-dimensional echo leaflets | Normal | Thickened | Thickened and calcified |
| Leaflet mobility | Normal | Moderately restricted | Severe and doming |
| RA | Normal | Dilated | Severely dilated |
| TV inflow velocity (m/s) | <0.7 | >0.7 | >1.5 |
| PHT (m/s) | 190 | ||
| Pressure | <2 | 2-6 | >7 |
| gradient (mmHg) |
RA: Right atrium, TV: Tomographic view, PHT: Pressure half-time
