Table 3. OCT abnormalities in patients with in-stent restenosis and stent thrombosis.

Stent failure mode	Abnormalities
In-stent restenosis
Early	Stent under-expansion; geographic miss; stent gap; longitudinal deformation; neointimal hyperplasia
Late	Neoatherosclerosis; stent fracture
Stent thrombosis
Early (acute/subacute)	Uncovered stent struts; malapposition; underexpansion; edge pathology (geographic miss, dissection/hematoma)
Late	Uncovered stent struts; malapposition; underexpansion; edge pathology (geographic miss, dissection/hematoma); in-stent restenosis; ruptured neoatherosclerosis; coronary evaginations
Very late	Uncovered stent struts; malapposition; underexpansion; edge pathology (geographic miss, dissection/hematoma); ins-tent restenosis; ruptured neoatherosclerosis; coronary evaginations

OCT, optical coherence tomography.