This grading scale incorporates anatomical features of the AVM to formulate a score between 1 and 5 (40). The higher the score, the higher the risk of operative morbidity and mortality. These predictive data can then be discussed with the family to determine whether operative intervention is desirable.
Factor | Measurement Parameter | Score |
Size | ||
0-3 cm | 1 | |
>3 to 6 cm | 2 | |
>6 cm | 3 | |
Location | ||
Noneloquent | 0 | |
Eloquent | 1 | |
Deep Venous Drainage | ||
Not present | 0 | |
Present | 1 |