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Evolution of carotid restenosis after endarterectomy
1Department of Cardiovascular Surgery, University Hospital of Strasbourg, France.
Insights
Carotid endarterectomy restenosis rates increase over time, with most progression occurring within the first year. Eversion technique showed promising results with no significant restenosis observed.
Area of Science:
- Vascular Surgery
- Cardiovascular Disease
Background:
- Carotid endarterectomy is a common procedure to prevent stroke.
- Restenosis after carotid endarterectomy is a concern for long-term outcomes.
- Understanding the natural history of restenosis is crucial for patient management.
Purpose of the Study:
- To assess the long-term restenosis rates after carotid endarterectomy.
- To evaluate the progression and regression of stenoses over time.
- To compare the outcomes of standard endarterectomy with the eversion technique.
Main Methods:
- Analysis of 176 consecutive carotid endarterectomies performed in 1987.
- Follow-up assessments at 11.5, 44, and 56 months using duplex scanning.
- Comparison of restenosis rates between standard and eversion endarterectomy techniques.
Main Results:
- The 50% restenosis rate increased from 9.7% to 11.9% by 44 months.
- Of 168 initially patent arteries, 36 showed stenosis progression within 44 months.
- Eversion technique (20 cases) showed no significant restenosis compared to standard (156 cases) with 13.4% restenosis.
Conclusions:
- Carotid artery disease remains unstable post-endarterectomy, with continued potential for progression or regression.
- Most stenotic progression occurs within the first year, but late events are also observed.
- The eversion technique for carotid endarterectomy appears to have a lower restenosis incidence.
Abstract:
Some 176 consecutive carotid endarterectomies performed during 1987 were assessed after 11.5 and 44 months. There were four perioperative deaths. At mean follow-up of 32.5 months the 50% restenosis rate progressed from 9.7% to 11.9%. Of the 168 carotid arteries with a normal patency at discharge, 36 showed progression of stenoses as judged by duplex scanning during the observation period of 44 months. Twenty-nine stenoses were present within 1 year and seven developed between 12 and 44 months. Successive assessments revealed marked differences in the evolution of restenoses which usually depended on the degree of severity reached at the end of the first year: 44% progressed, 28% regressed and only 28% remained stable. The risk of late occlusion in vessels with a < 50% restenosis at 1 year was below 1% and the risk of progressing to a stenosis > 50% was 3.3%. Assessment at 56 months was limited to patients who had a restenotic lesion during the first 44 months. It confirmed that the disease was still unstable with progression in 7% of cases and regression in 10%. This study did not demonstrate any significant restenosis after 20 endarterectomies using the eversion technique compared with an incidence of 13.4% after 156 standard endarterectomies.