Table 1 Grading of mitral and aortic valve regurgitant and stenotic lesions
Valve lesion | Grading method | Mild | Moderate | Severe |
|---|---|---|---|---|
Mitral stenosis | Valve area | ≥2.0 cm2 | 1.6–1.9 cm2 | ≤1.5 cm2 |
Primary mitral regurgitation | Vena contracta width | < 0.3 cm | 0.3–0.69 cm | ≥0.7 cm |
Regurgitant fraction | < 30% | 30–49% | ≥50% | |
Regurgitant volume | < 30 mls | 30-59 mls | ≥60 mls | |
Effective regurgitant orifice area | < 0.2 cm2 | 0.2–0.39 cm2 | ≥0.4 cm2 | |
Aortic sclerosis | Peak velocity | < 2.5 m/s | ||
Aortic stenosis | Peak velocity | 2.6–2.9 m/s | 3.0–4.0 m/s | ≥4.0 m/s |
Mean gradient | < 20 mmHg | 20-39 mmHg | ≥40 mmHg | |
Valve area by continuity equation | > 1.5cm2 or indexed AVA > 0.85 cm2/m2 | 1.0–1.5cm2 or indexed AVA 0.6–0.85 cm2/m2 | ≤ 1.0cm2 or indexed AVA ≤ 0.6 cm2/m2 | |
Aortic regurgitation | Vena contracta width | < 0.3 cm | 0.3–0.6 cm | ≥0.6 cm |
Central jet width/LVOT width | < 25% | 25–64% | ≥65% | |
Regurgitant fraction | < 30% | 30–49% | ≥50% | |
Regurgitant volume | <30 mls | 30–59 mls | ≥60 mls | |
Effective regurgitant orifice area | < 0.1 cm2 | 0.1–0.29 cm2 | ≥0.3 cm2 | |