Spetzler-Martin AVM Grading Scale

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