Angiographic restenosis and classification |
Diameter stenosis ≥50% |
Type I focal: ≤10 mm in length |
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 |
Clinical restenosis: Assessed objectively as requirement for ischemia-driven repeat revascularization |
Diameter stenosis ≥50% and one of the following: |
- Positive history of recurrent angina pectoris, presumably related to target vessel
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- Objective signs of ischemia at rest (ECG changes) or during exercise test (or equivalent), presumably related to target vessel
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- Abnormal results of any invasive functional diagnostic test (eg, coronary flow velocity reserve, FFR <0.80); IVUS minimum cross-sectional area <4 mm2 (and <6.0 mm2 for left main stem) has been found to correlate with abnormal FFR and need for subsequent TLR[1-3]
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- TLR with diameter stenosis ≥70% even in absence of the above ischemic signs or symptoms
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