Grading of Mitral Regurgitation
Parameter | Moderate MR | Severe MR |
|---|---|---|
Vena contracta* | 3–7 mm | > 7 mm |
Effective regurgitant orifice area | 0.20–0.40 cm2 | > 0.40 cm2 |
Regurgitant volume | 30–60 mL | > 60 mL |
Regurgitant fraction | 30–50% | > 50% |
* The narrowest diameter of the fluid stream downstream of an abnormal valve orifice; it is slightly smaller than the anatomic valve orifice. | ||
MR = mitral regurgitation. | ||
Data from Otto CM, Nishimura RA, Bonow RO, et al: 2020 ACC/AHA Guideline for the Management of Patients With Valvular Heart Disease: Executive Summary: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation 143(5):e35–e71, 2021. doi: 10.1161/CIR.0000000000000932 | ||
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