David M. Hume Memorial Lecture. An overview of the stroke problem in the carotid territory

Area of Science:

• Vascular Surgery
• Neurology
• Cardiology

Background:

• Carotid artery atherosclerosis is a significant risk factor for stroke.
• Transient ischemic attacks (TIAs) are warning signs of potential stroke.
• Carotid endarterectomy is a surgical procedure to remove plaque from the carotid artery.

Purpose of the Study:

• To evaluate the long-term outcomes of carotid endarterectomy.
• To identify the primary risks and benefits associated with the procedure.
• To assess the role of antiplatelet agents in preventing stroke.

Main Methods:

• Review of 1,000 carotid endarterectomies over a 20-year period.
• Analysis of patient outcomes, including TIA relief, operative mortality, and recurrent stenosis.
• Evaluation of intraoperative monitoring techniques like continuous electroencephalographic monitoring.
• Assessment of coexisting cardiac disease as an operative hazard.

Main Results:

• Approximately 85% of patients experienced relief from TIAs.
• Operative mortality was 1.3%, primarily due to myocardial infarction.
• Recurrent stenosis rate was 3.1%.
• Coexisting cardiac disease was identified as the main operative hazard.
• Continuous electroencephalographic monitoring proved reliable for detecting cerebral hypoperfusion.
• Prophylactic carotid endarterectomy demonstrated minimal mortality and morbidity.
• Antiplatelet agents showed efficacy in reducing TIAs but limited protection against stroke.

Conclusions:

• Carotid endarterectomy is a safe and effective procedure for TIA patients.
• Managing cardiac comorbidities is crucial for reducing operative risks.
• Continuous electroencephalographic monitoring aids in surgical safety.
• Atherosclerotic plaques in the carotid artery require intervention.
• Antiplatelet therapy alone is insufficient for comprehensive stroke prevention.