From: Bilateral vertebral artery injury leads to brain death following traumatic brain injury: a case report
Stage
Stroke rate (%)
Mortality rate (%)
1
Lumen narrowing < 25%
3
11
2
Lumen narrowing ≥ 25%, intraluminal thrombus
Pseudoaneurysm
33
4
Occlusion
44
22
5
Vessel transection
100