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Related Experiment Videos

Unilateral asymptomatic carotid disease does not require surgery

C D Irvine1, S E Cole, P X Foley

  • 1Department of Surgery, Bristol Royal Infirmary, U.K.

European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery
|October 27, 1998
PubMed
Summary

Carotid endarterectomy (CEA) may not benefit asymptomatic patients with unilateral carotid artery disease. Bilateral disease, especially with high-grade stenosis, increases stroke risk and warrants further clinical trial investigation.

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Area of Science:

  • Vascular Surgery
  • Neurology
  • Clinical Epidemiology

Background:

  • Carotid endarterectomy (CEA) is established for symptomatic severe carotid stenosis (>70%).
  • The benefit of CEA for asymptomatic carotid stenosis is less clear, with stroke risk potentially not justifying surgery.
  • Identifying asymptomatic patients who would benefit from CEA is crucial.

Purpose of the Study:

  • To evaluate the natural history of asymptomatic internal carotid artery stenosis.
  • To identify specific patient subgroups who may benefit from carotid endarterectomy (CEA).

Main Methods:

  • Retrospective analysis of 564 asymptomatic patients with >40% ipsilateral internal carotid artery stenosis.
  • Patient data traced via hospital records, GP databases, and national registries.

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  • Follow-up included stroke, transient ischemic attack (TIA), and mortality data.

    • Main Results:

    • 487 patients were analyzed with an average follow-up of 41 months.
    • The overall annual stroke rate was 2.74 per 100 person-years.
    • Bilateral disease increased stroke risk (relative risk 2.35), particularly with >90% contralateral stenosis (9.6 per 100 person-years). Unilateral disease showed <5% stroke risk in the first year.

    Conclusions:

    • Carotid endarterectomy (CEA) is unlikely to benefit patients with unilateral asymptomatic carotid disease.
    • Patients with bilateral asymptomatic carotid disease, especially high-grade stenosis, represent a group that may benefit from CEA and warrant inclusion in clinical trials.