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| Parameters of severity | Mild | Moderate | Severe |
|---|---|---|---|
| Two-dimensional leaflet | Normal | Thickened and moderate restriction | Thickened, calcified, severe restriction |
| RV | Normal | Mild hypertrophy | Moderate hypertrophy |
| CWD peak velocity (m/s) | <3 | 3-4 | >4 |
| Peak gradient (mmHg) | <36 | >36 | >64 |
CWD: Continuous wave Doppler, RV: Right ventricle
