Feliciano et al proposed a grading system for a cerebral arteriovenous malformation being treated by an endovascular embolization. This can help to identify a patient at increased risk for complications. The authors are from the University of Puerto Rico.
Patient selection: cerebral arteriovenous malformation (AVM) undergoing an endovascular procedure
Parameters:
(1) number of feeding vessels
(2) eloquence of adjacent areas
(3) presence of arteriovenous fistula(e) or fistulous component(s)
Parameter
Finding
Points
number of feeding vessels
1 or 2
1
3 to 5
2
>= 6
3
adjacent area
noneloquent
0
eloquent
1
AV fistula
none
0
one or more
1
where:
• Eloquent: motor or sensory cortex including language and vision; hypothalamus; thalamus; brainstem; cerebellar peduncles
total score =
= SUM(points for all 3 parameters)
Interpretation:
• minimum score: 1 (Grade I)
• maximum score: 5 (Grade V)
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