Table 1

Selected arteriovenous malformation (AVM) features

ValueDefinitionScoring value
SizeSize of AVM nidus1 (<3 cm)
2 (3–6 cm)
3 (>6 cm)
Arterial pediclesNumber of arterial pedicles feeding AVM1 (1–3 pedicles)
2 (4–6 pedicles)
3 (>6 pedicles)
Draining veinsNumber of draining veins1 (1–3 draining veins)
2 (4–6 draining veins)
3 (>6 draining veins)
Vascular eloquenceEmergence of small and short arterial pedicles from parent vessel whose injury/occlusion would cause severe neurologic complications0 (non-eloquent)
1 (eloquent)