Grigioni et al reported the MIDA Mortality Risk Score for patients with degenerative mitral regurgitation. The authors are from multiple institutions from around the world with data entered into the Mitral Regurgitation International Database (MIDA).
Patient selection: degenerative mitral regurgitation
Parameters:
(1) age in years
(2) symptoms
(3) atrial fibrillation
(4) left atrial diameter in mm
(5) right ventricular systolic pressure in mm Hg
(6) left ventricular end-systolic diameter in mm
(7) left ventricular ejection fraction in percent
Parameter
Finding
Points
age in years
< 65 years
0
>= 65 years
3
symptomatic
no
0
yes
3
atrial fibrillation
absent
0
present
1
left atrial diameter
< 55 mm
0
>= 55 mm
1
right ventricular systolic pressure
<= 50 mm Hg
0
> 50 mm Hg
2
left ventricular end-systolic diameter
< 40 mm
0
>= 40 mm
1
left ventricular ejection fraction in percent
> 60%
0
<= 60%
1
total score =
= SUM(points for all 7 parameters)
Interpretation:
• minimum score: 0
• maximum score: 12
• The higher the score the worse the prognosis.
Score
5-Year Survival with Medical Management
5-Year Survival with Surgical Management
0
98%
99%
7 or 8
57%
82%
11 or 12
21%
57%
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