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A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis
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A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis

Published on: August 12, 2025

Strokes after cardiac surgery and relationship to carotid stenosis

Yuebing Li1, Debra Walicki, Claranne Mathiesen

  • 1Department of Medicine, Lehigh Valley Hospital and Health Network, 1250 S Cedar Crest Blvd, Ste 405, Allentown, PA 18103, USA.

Archives of Neurology
|September 16, 2009
PubMed

Insights

Significant carotid stenosis does not directly cause postoperative stroke after cardiac surgery. Combining carotid and cardiac procedures is not recommended for asymptomatic stenosis to prevent stroke.

Area of Science:

  • Cardiovascular Surgery
  • Neurology
  • Vascular Surgery

Background:

  • Postoperative stroke is a serious complication following cardiac operations.
  • The role of significant carotid stenosis in the pathogenesis of these strokes remains debated.

Purpose of the Study:

  • To critically examine the association between significant carotid stenosis and stroke after cardiac operations.
  • To evaluate the impact of combined carotid and cardiac procedures on stroke risk.

Main Methods:

  • Retrospective cohort study involving 4335 patients undergoing coronary artery bypass grafting or aortic valve replacement.
  • Analysis of stroke incidence, subtype, and arterial distribution.
  • Correlation of stroke occurrence with significant carotid stenosis using clinical data and computed tomographic head scans.

Main Results:

  • Stroke occurred in 1.8% of patients, with most strokes not directly correlated to significant carotid stenosis (94.7%).
  • Only 5.3% of strokes were large-vessel type, and many were not confined to a single carotid artery territory.
  • Combined carotid and cardiac operations significantly increased postoperative stroke risk compared to cardiac surgery alone (15.1% vs 0%; P = .004).

Conclusions:

  • No direct causal relationship exists between significant carotid stenosis and postoperative stroke in cardiac surgery patients.
  • Combining carotid and cardiac procedures is not necessary or effective for preventing stroke in patients with asymptomatic carotid stenosis.
Abstract

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