Table 3. ISR classification.
Type I focal |
≤10 mm in length intrastent |
IA articulation or gap |
IB margin |
IC focal body |
ID multifocal |
Type 2 diffuse |
>10 mm intrastent |
Type 3 proliferative |
10 mm extending beyond the stent margins |
Type 4 total occlusion |
Restenotic lesions with TIMI flow grade of 0 |