The Spetzler-Martin grading system is used to estimate the risk of surgical resection of an arteriovenous malformation. The three elements are size, venous drainage, and location. Higher grades are associated with greater surgical morbidity and mortality.
Spetzler RF, Martin NA.
Journal of Neurosurgery 1986, 65 (4): 476-83
The Spetzler-Martin Score calculator is created by QxMD.