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Spetzler-Martin AVM grading system The Spetzler-Martin AVM grading system allocates points for various features of intracranial AVM's to give a score between 1 and 5 in order to estimate the risk of surgery for that patient. |
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| Size of nidus |
small (<3 cm) = 1 medium (3-6 cm) = 2 large (>6 cm) = 3 |
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| Eloquence of adjacent brain |
non-eloquent = 0 eloquent = 1 |
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| Venous drainage |
superficial only = 0 deep = 1 |
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Reference
Spetzler RF, Martin NA. (1986) A proposed grading system for arteriovenous malformations. J Neurosurg. Oct;65(4):476-83. Click here for abstract.