Injury grade | Description |
I | Luminal irregularity of dissection with < 25% luminal narrowing |
II | Dissection or intramural hematoma with ≥ 25% luminal narrowing, intraluminal thrombus, or raised intimal flap |
III | Pseudoaneurysm |
IV | Occlusion |
V | Transection with free extravasation |