. 2023 Jun 16;39(10):1963–1977. doi: 10.1007/s10554-023-02893-z

Table 5.

Mitral valve regurgitation (MVR) grading system recommended by the consensus statement on assessing MVR by cardiovascular magnetic resonance imaging (CMR).

Adapted from consensus Garg et al. [27]

Type of MR	Grading of severity
Primary	MR_RF < 20%	MR_RF = 20–39%	MR_RF = 40–50%; MVR > 55–60 ml	MR_RF > 50%
Secondary	MVR < 30 ml	MVR = 30–60 ml	MVR > = 60 ml	N/A

Type of MR

Grading of severity

Mild

Moderate

Severe

Very severe

Primary

MR_RF < 20%

MR_RF = 20–39%

MR_RF = 40–50%;

MVR > 55–60 ml

MR_RF > 50%

Secondary

MVR < 30 ml

MVR = 30–60 ml

MVR > = 60 ml

N/A

MR_RF, mitral regurgitation fraction