Zoghbi - Case Studies - Quantification of Severity of .
MR 2-3 criteria EROA 0.2-0.29 cm2 RVol30-44 ml RF 30-39% MR Grade II EROA < 0.2 cm2 RVol< 30 ml RF < 30% MR Grade I EROA ≥ 0.4 cm2 RVol≥ 60 ml ¶ RF ≥ 50% MR Grade IV criteria 3 specific criteria for severe MR or elliptical orifice EROA 0.30-0.39 cm2 RV