From: Cardiovascular magnetic resonance in the evaluation of heart valve disease
 | Mild | Moderate | Severe |
---|---|---|---|
Qualitative | |||
 Angiographic grade | 1+ | 2+ | 3-4+ |
 Colour Doppler jet area | Small, central jet (<4cm2 or <20% LA area) | Signs of MR greater than mild present, but no criteria for severe MR. | Vena contracta width greater than 0.7 cm with large central MR jet (area < 40% of LA area) or with a wall-impinging jet of any size, swirling in LA. |
 Doppler vena contracta width (cm) | <0.3 | 0.3-0.69 | ≥0.7 |
Quantitative (cardiac catheterisation or echo) | |||
 Regurgitant volume (ml) | <30 | 30-59 | ≥60 |
 Regurgitant fraction (%) | <30 | 30-49 | ≥50 |
 Regurgitant orifice area (cm2) | <0.2 | 0.2-0.39 | ≥0.4 |
Additional essential criteria | |||
 LA size |  |  | Enlarged |
 LV size |  |  | Enlarged |