Table 1.

Mitral regurgitation severity scoring system outline.

Echocardiographic Parameter	Normal	Mild	Moderate	Severe
Color Doppler regurgitant jet area	None, or trivial (0)	<20% of left atrial area (1)	20–40% of left atrial area (2)	>40% of left atrial area (3)
Mitral inflow	E wave <1.2 m/s (1)	E wave <1.2 m/s (1)	E wave >1.2 m/s with E wave deceleration time >80 milliseconds (2)	E wave >1.2 m/s with E wave deceleration time <80 milliseconds (3)
Left ventricular internal dimension in diastole	Normal (1)	Normal (1)	Enlarged (<20% over upper reference limit for body weight) (2)	Enlarged (>20% over upper reference limit for body weight) (3)
Leaflet anatomy	Normal (1)	Normal (1) or mitral valve prolapse seen in 2 views (2)	Normal (1) or mitral valve prolapse seen in 2 views (2)	Flail leaflet (3)
Continuous wave Doppler mitral regurgitation jet density	None (0)	Incomplete/faint (1)	Dense (2)	Dense (2)
Score ranges	3	4–7	8–11	12–14

Numbers in parenthesis represent the assigned scores for each echocardiographic parameter.