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Contralateral disease progression after carotid endarterectomy

B Satiani1, T Y Chen, L Shook

  • 1Department of Surgery, Grant Medical Center, Columbus, Ohio.

Surgery
|July 1, 1993
PubMed
Summary

Contralateral carotid artery disease progression after unilateral carotid endarterectomy (CE) affects 21% of patients. Regular monitoring is crucial, especially for those with existing stenosis, to prevent future stroke events.

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Area of Science:

  • Vascular Surgery
  • Neurology
  • Cardiovascular Medicine

Background:

  • Understanding the natural history of the contralateral carotid artery is essential after unilateral carotid endarterectomy (CE).
  • Assessing the risk of new symptoms and disease progression in the non-operated carotid artery is critical for patient management.

Purpose of the Study:

  • To investigate the incidence of new symptoms and disease progression in the contralateral carotid artery following unilateral CE.
  • To identify predictors of adverse events in the contralateral artery.

Main Methods:

  • A cohort of 127 patients undergoing unilateral CE was followed clinically and with serial duplex scanning.
  • Patients were stratified based on initial contralateral stenosis severity (<50% vs. 50-99%).

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Main Results:

  • Over a mean follow-up of 44 months, 7% experienced new hemispheric events and 21% showed significant disease progression.
  • Patients with initial contralateral stenosis ≥50% had a higher incidence of new symptoms (23% vs. 2%, p < 0.003) and underwent more subsequent CE procedures (p < 0.001).
  • New symptoms did not consistently correlate with the degree of contralateral disease progression.

Conclusions:

  • Significant contralateral carotid artery disease progression (21%) and new symptoms (7%) occur after unilateral CE.
  • Initial contralateral stenosis >50% predicts future hemispheric symptoms, likely transient ischemic attacks.
  • Serial clinical and duplex scanning is recommended for all patients post-unilateral CE due to observed progression across varying stenosis levels.