Relation between various quantitative parameters and severity of mitral regurgitation
| MR severity | Angiographic grade | Regurgitant fraction (%) | EROA (mm2) | VC width* (cm) |
|---|---|---|---|---|
| *Maximum width measurable from multiple views. | ||||
| EROA, effective regurgitant orifice area; MR, mitral regurgitation; VC, vena contracta. | ||||
| Sources: Dujardin et al,29 Hall et al.37 | ||||
| Mild | 1 | <30 | <20 | <0.3 |
| Moderate | 2 and 3 | 30–50 | 20–40 | 0.3–0.5 |
| Severe | 4 | >50 | >40 | >0.5 |