In TIMI Grade<unk>  thrombus, a chronic total occlusion is present.
The characteristics of a chronic total occlusion are:
The occlusion does not have a "beak like" appearance, and the occlusion has a blunt cut-off/edge.
Extensive collaterals may be present.
The clot generally propagates backwards up the proximal vessel to the nearest proximal side branch.
TIMI thrombus grade 6
TIMI thrombus grade 0
TIMI thrombus grade 5
TIMI thrombus grade 4
TIMI thrombus grade 3
TIMI thrombus grade 2
TIMI thrombus grade 1
TIMI flow grade 0