Chen et al reported the VALE score for predicting the risk of hemorrhage from a brain arteriovenous malformation (AVM). The result can help to identify a patient who may require more aggressive management. The authors are from
Patient selection: brain AVM
VALE is an acronym based on the names of the score components.
Parameters:
(1) ventricular system involvement (V)
(2) aneurysm, venous (A)
(3) location deep (L)
(4) exclusively deep drainage (E)
Parameter
Finding
Points
ventricular system involvement
no
0
yes
2
venous aneurysm
no
0
yes
-4
deep location
no
0
yes
1
exclusively deep drainage
no
0
yes
2
total score =
= SUM(points for the 4 parameters)
Interpretation:
• minimum score: -4
• maximum score: 5
Score
Risk Group
10-Year Hemorrhage Free
-3 or -4
low
96%
-2 to 1
moderate
93%
2 to 5
high
76%
Performance:
• The area under the ROC curve is 0.77.
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