Contralateral disease progression after carotid endarterectomy
Insights
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.
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%).
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.
Background:
We report the natural history of the carotid artery contralateral to the ipsilateral endarterectomized carotid artery.
Methods:
The incidence of new symptoms and disease progression of the patient contralateral side after unilateral carotid endarterectomy (CE) was studied by clinical follow-up and serial duplex scanning in 127 patients.
Results:
During a mean follow-up of 44 months, new hemispheric events occurred in nine (7%) and significant progression was recorded in 27 (21%) patients. In 97 patients with initial stenosis of less than 50% (group I), contralateral progression to greater than 50% was noted in 22% and new symptoms (one transient ischemic attack and one cerebrovascular accident) in 2% of patients; three patients underwent CE. In 30 patients with initial stenosis between 50% and 99% (group II), new symptoms (all transient ischemic attacks) occurred in seven (23%) (group II vs group I; p < 0.003) and nine underwent CE (group II vs group I; p < 0.001). Progression in 26 patients with 50% to 79% stenosis within group II to greater than 80% was noted in 19% of patients (difference not significant compared with group I).
Conclusions:
Overall, new symptoms occurred in 7% and significant contralateral disease progression in 21% of patients; subsequent CE was performed in 9.4% of patients. Initial presence of greater than 50% contralateral stenosis is a predictor of future hemispheric symptoms, which are likely to be transient ischemic attacks. New symptoms did not necessarily correlate with disease progression. Because disease progression was observed in patients with varying degrees of initial contralateral stenosis, serial clinical and duplex scanning in all patients undergoing unilateral CE is recommended.
More Related Videos
07:04Creation of Two Saccular Elastase-Digested Aneurysms with Different Hemodynamics in One Rabbit
Published on: April 15, 2021
09:36A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis
Published on: August 12, 2025