For educational use. This tool is intended for reference and education. All care decisions require a direct clinical assessment of the patient and independent verification of doses and values by the treating team. The calculation runs locally in your browser, no patient data is sent to any server.

Spetzler–Martin AVM Grade

Grades cerebral AVMs from 1 to 5 based on three features (the size, the pattern of venous drainage, and the eloquence of the surrounding brain). Correlates with surgical risk. Grade 6 = inoperable.

1
S–M Grade
Low surgical risk
Source: Spetzler RF, Martin NA. A proposed grading system for arteriovenous malformations. J Neurosurg 1986;65(4):476–483. PMID 3760956 · doi:10.3171/jns.1986.65.4.0476