Ghoreishi et al reported a Mortality Risk Score (MRS) for predicting operative mortality of a patient with Type A aortic dissection. The authors are from the University of Maryland.
Patient selection: acute Type A aortic dissection
Parameters:
(1) serum lactic acid in mmol/L
(2) serum creatinine in mg/dL
(3) liver malperfusion
Parameter
Finding
Points
serum lactic acid
5.5 * (lactate)
serum creatinine
8 * (creatinine
liver malperfusion
no
-8
yes
+8
total score =
= SUM(points for all of the parameters)
Interpretation:
• minimum score: around -4 or -5
• maximum score: around 40
• The higher the score the greater the mortality.
Score
Mortality
< 7
4%
7 to 20
14%
> 20
37%
Performance:
• The area under the ROC curve is 0.75.
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