Optimal outcome for "high-risk" carotid endarterectomy

Area of Science:

• Vascular Surgery
• Neurology
• Anesthesiology

Background:

• Carotid endarterectomy (CEA) carries a low stroke risk, but certain high-risk factors (prior ipsilateral stroke, contralateral carotid occlusion, acute cerebral ischemia) can increase morbidity and mortality.
• Temporary intraluminal carotid shunts are traditionally used in high-risk CEA, despite potential complications like perioperative stroke.

Purpose of the Study:

• To evaluate the necessity and safety of routine carotid shunting in high-risk patients undergoing CEA.
• To assess whether "awake" anesthesia techniques can reduce the need for shunts in complex CEA cases.

Main Methods:

• A retrospective analysis of 175 patients undergoing CEA, with 68 classified as high-risk.
• CEA was performed under regional or local anesthesia in all high-risk patients, with shunt use documented.
• Outcomes, including shunt insertion rates and perioperative stroke, were compared between high-risk and low-risk groups.

Main Results:

• 97% of high-risk patients (66/68) underwent CEA without a shunt, including 92% with contralateral carotid occlusion.
• Shunt insertion and perioperative stroke rates in high-risk patients did not differ from low-risk patients.
• Only two high-risk patients required shunt insertion due to transient neurological events.

Conclusions:

• The routine use of temporary carotid shunts may not be necessary in high-risk CEA patients.
• "Awake" anesthesia facilitates effective cerebral collateral circulation monitoring, potentially reducing shunt requirements.
• CEA outcomes in high-risk patients managed without shunts are comparable to those in uncomplicated cases.