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Table 1 Echocardiographic criteria used to define severity of mitral regurgitation based on multi parametric quantitative and qualitative analysis as suggested by american Society of Echocardiography Reccomendations [16]

From: Non invasive evaluation of cardiomechanics in patients undergoing MitraClip procedure

Mitral Regurgitation Criteria
Grade Mild 1+ Moderate 2+ Moderate to severe 3+ Severe 4+
Color flow Doppler <4 cm2 or <10 cm2 LA area 4-6 cm2 or 10-30% of left LA area 6 to <8 cm2 or 30% to <40% of LA area >8 cm2 or >40% of LA area
Regurgitant Volume (ml/beat) <30 30-44 45-59 >60
Regurgitant Fraction (%) <30 30-39 40-49 >50
Pulmonary Vein flow Systolic Dominant Diastolic Dominant All Diastolic Systolic Reversal