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| Type of ISR | Characteristics | Occurrence |
| I-focal | Length < 10 mm | 42% |
| IA | The articulation or gap between stents | |
| IB | The proximal or distal margin | |
| IC | The body of the stent | |
| ID | Multifocal | |
| II-diffuse | Length >10 mm, not exceeding the edges of the stent | 21% |
| III-proliferative | Exceeding the edges of the stent | 30% |
| IV-occlusive | Total occlusion with TIMI 0 | 7% |
ISR: in-stent restenosis; TIMI: thrombolysis in myocardial infarction.
