Spetzler-Martin grade

AVM grading scale (1986)

Size

  • 1 point: <3 cm
  • 2 points: 3-6 cm
  • 3 points: > 6 cm

    Eloquence of adjacent brain

  • 0 points: non-eloquent
  • 1 point: eloquent

    Venous drainage

  • 0 points: superficial only
  • 1 point: deep

    Reference

    Greenberg's Handbook of Neurosurgery, 7th edition