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تعداد آیتم قابل مشاهده باقیمانده : 3 مورد
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Definitions and classification of stent restenosis

Definitions and classification of stent restenosis
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
  • Objective signs of ischemia at rest (ECG changes) or during exercise test (or equivalent), presumably related to target vessel
  • 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]
  • TLR with diameter stenosis ≥70% even in absence of the above ischemic signs or symptoms
TIMI: thrombolysis in myocardial infarction; ECG: electrocardiography; FFR: fractional flow reserve; IVUS: intravascular ultrasound; TLR: target lesion revascularization.
References:
  1. Abizaid AS, Mintz GS, Mehran R, et al. Long-term follow-up after percutaneous transluminal coronary angioplasty was not performed based on intravascular ultrasound findings: importance of lumen dimensions. Circulation 1999; 100:256.
  2. Jasti V, Ivan E, Yalamanchili V, et al. Correlations between fractional flow reserve and intravascular ultrasound in patients with an ambiguous left main coronary artery stenosis. Circulation 2004; 110:2831.
  3. Doi H, Maehara A, Mintz GS, et al. Impact of in-stent minimal lumen area at 9 months poststent implantation on 3-year target lesion revascularization-free survival: a serial intravascular ultrasound analysis from the TAXUS IV, V, and VI trials. Circ Cardiovasc Interv 2008; 1:111.
Original table modified for this publication. From: Dangas G, Claessen B, Caixeta A, et al. In-Stent Restenosis in the Drug-Eluting Stent Era. J Am Coll Card 2010; 56:1897. Table used with the permission of Elsevier Inc. All rights reserved.
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