Spetzler-Martin Scale
Info
Size Small (>3 cm) Medium (3–6 cm) Large (>6 cm)
Location Noneloquent Eloquent
Pattern of Venous Drainage Superficial only Deep
R e s u l t s
AVM Score
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Info
Spetzler-Martin Scale

Classically, risk of operative morbidity has been related to the Spetzler—Martin (SM) scale which scores AVM on 3 features for a grading score of 1 to 5 .

  • SM grades I—III: Morbidity 0—5%, mortality 0—4%
  • SM grades IV—V: Morbidity 12.2—21.9%, mortality 11.1—38.4%