Related Experiment Video
Updated: Aug 8, 2026
A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis
Published on: May 14, 2013
Morphology and location of restenosis following bare metal coronary stenting
Marc J Schweiger1, Ehsan Ansari, Gregory R Giugliano
1Baystate Medical Center, Springfield, Massachusetts, USA.
Insights
Restenosis after coronary stenting commonly occurs within or near the stent. Lesions near the stent edge appear earlier, potentially limiting treatment effectiveness.
Area of Science:
- Cardiovascular Medicine
- Interventional Cardiology
- Medical Imaging
Background:
- Restenosis following bare metal coronary stenting is a frequent complication.
- The precise location and characteristics of restenotic lesions after stent implantation require further elucidation.
Purpose of the Study:
- To investigate the location, type, and temporal patterns of restenotic lesions after coronary stent implantation.
- To characterize stent-related restenosis in patients undergoing repeat coronary angiography.
Main Methods:
- Retrospective review of clinical and angiographic data from 203 patients with stent-related restenosis.
- Analysis of lesions within 10 mm of stent margins, classifying them as Class I (within stent) or Class II (adjacent to stent).
- Assessment of lesion location, type, and timing relative to the index stenting procedure.
Main Results:
- A total of 234 stent-related restenosis lesions were analyzed.
- Class I lesions (within stent) occurred in 52% of patients, and Class II lesions (adjacent to stent) in 48%.
- New lesions at stent edges (Class II) presented significantly earlier (1-3 months) than other lesion types (p < 0.001).
Conclusions:
- A significant proportion of patients develop restenotic lesions adjacent to the coronary stent.
- The early presentation of edge lesions suggests they may impact the efficacy of current stent-based therapies.
- The timing of symptom recurrence after stenting may be influenced by the location of the restenotic lesion.
Abstract:
Restenosis following bare metal coronary stenting is common. The location and characteristics of restenotic lesions in patients who have undergone coronary stent implantation is not well described. The purpose of this study was to determine the location, type and temporal distribution of stent-related restenosis. We reviewed the clinical and angiographic characteristics of 203 consecutive patients with stent-related restenosis undergoing a repeat clinically-indicated coronary angiogram, 30 days to 1 year after the index procedure. All lesions within 10 mm of the proximal and distal margins of the stent were included in the analysis. An angiographic classification was developed based on lesion location. Class I lesions were those occurring within the stent, and Class II comprised those lesions occurring within 10 mm of the proximal and distal stent edge. We classified a total of 234 stent-related restenosis lesions. Class I lesions were found in 52% of patients, and Class II in 48%. Three-fifths of the patients who developed new lesions at a stent edge presented 1-3 months following the initial procedure, which was significantly earlier than other lesion types (p < 0.001). A substantial number of patients undergoing repeat angiography after stent placement have lesions proximate, but peripheral, to the stent. This may limit the effectiveness of stent-based efforts to reduce restenosis. The time interval between coronary stenting and symptom recurrence appears to vary according to lesion location.