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A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis
Published on: May 14, 2013
Restenosis after carotid endarterectomy
H Sadideen1, P R Taylor, T S Padayachee
1Department of Ultrasound Angiology, Guy's and St. Thomas' Hospital Trust, London, UK.
Insights
Carotid endarterectomy (CE) effectively reduces stroke risk. Recurrent carotid stenosis after CE can occur, with management options including repeat surgery or endovascular techniques for significant cases.
Area of Science:
- Vascular Surgery
- Cardiovascular Medicine
- Interventional Cardiology
Background:
- Carotid endarterectomy (CE) is proven effective in reducing stroke risk for symptomatic and asymptomatic carotid stenosis.
- Long-term carotid artery patency post-CE is crucial for surgical success.
- Recurrent carotid stenosis incidence ranges from 1-37%, with a low rate of symptomatic restenosis (0-8%).
Purpose of the Study:
- To review the management of recurrent carotid stenosis following carotid endarterectomy.
- To discuss treatment indications and evolving therapeutic options for restenosis.
Main Methods:
- Review of randomized trials and literature on carotid endarterectomy outcomes.
- Analysis of causes and incidence of recurrent carotid stenosis.
- Evaluation of current and emerging treatment strategies.
Main Results:
- Recurrent stenosis is typically due to myointimal hyperplasia (early) or atherosclerosis (late).
- Symptomatic recurrent stenosis generally warrants surgical intervention.
- Asymptomatic stenosis >80% may also benefit from intervention, with repeat endarterectomy or endovascular methods considered.
Conclusions:
- Management of recurrent carotid stenosis after CE presents a clinical dilemma.
- Repeat endarterectomy with patch angioplasty is a primary treatment.
- Endovascular techniques are increasingly utilized for recurrent carotid stenosis treatment.
Abstract:
Multiple randomised trials over the last decade for both symptomatic and asymptomatic carotid stenosis have proven the efficacy of carotid endarterectomy (CE) in reducing the risk of stroke. The long-term patency of the carotid artery after CE is an important factor in the success of the operation. The incidence of recurrent carotid stenosis (excluding residual lesions) ranges from 1 to 37% with only 0-8% of patients having restenosis-related symptoms (1). Generally, recurrent carotid stenosis is attributed to myointimal hyperplasia during the early postoperative period (within 3 years) or recurrent atherosclerosis thereafter. The management of recurrent carotid stenosis after CE remains a dilemma. It is generally accepted that operation for significant recurrent carotid stenosis is indicated for symptomatic patients, and several authors also recommend CE for >80% asymptomatic recurrent stenosis. Treatment of recurrent carotid stenosis involves repeat endarterectomy with patch angioplasty, although more recently endovascular techniques have been used.
