Related Experiment Videos
[Surgical indications in asymptomatic internal carotid artery stenosis and in relation to heart surgery
V Schlosser1, G M von Reutern, D Birnbaum
1Abteilung für Herz- und Gefässchirurgie, Universitätsklinikums Freiburg/Br.
Insights
Carotid endarterectomy offers stroke prophylaxis, but evidence doesn't clearly favor surgery over medical treatment. Surgery may be warranted for symptomatic stenosis, but not clearly for asymptomatic cases.
Area of Science:
- Vascular Surgery
- Neurology
- Preventive Medicine
Context:
- Carotid endarterectomy (CEA) has been a common procedure for stroke prevention for decades.
- Current evidence lacks definitive proof of CEA's superiority over medical management for stroke prophylaxis and survival.
- Recent large studies report CEA's operative mortality around 1% and perioperative stroke rate at 3.4%.
Purpose:
- To evaluate the efficacy of carotid endarterectomy (CEA) versus medical treatment for stroke prophylaxis.
- To determine the established indications for CEA in both symptomatic and asymptomatic internal carotid artery stenosis.
- To analyze the long-term outcomes and risks associated with both surgical and medical interventions.
Summary:
- For symptomatic internal carotid stenosis, the annual stroke risk without surgery is 5%, potentially justifying CEA.
- For asymptomatic internal carotid stenosis, the annual stroke risk is 1-2%, which is lower than the risks associated with prophylactic surgery.
- CEA does not provide complete stroke protection, and long-term follow-up shows no significant difference in outcomes between surgical and medical treatments.
Impact:
- The established indication for CEA in asymptomatic internal carotid stenosis remains unclear.
- Further prospective, randomized studies are needed to confirm potential benefits in high-risk subgroups (e.g., high-grade stenosis, multiple vessel disease).
- This analysis informs clinical decision-making regarding the appropriate use of carotid endarterectomy for stroke prevention.
Abstract:
In the last 30 years, carotid endarterectomy has been employed on a wide-spread basis with the intention of providing surgical prophylaxis of stroke. Currently, however, there is no evidence available from prospective, randomized comparative studies indicating a clear superiority of surgical treatment versus medical treatment with respect to stroke prophylaxis or improvement in survival. Based on recent publications with sufficiently large patient populations, operative mortality appears to be about 1% and the rate of perioperative stroke about 3.4%. In those with symptomatic internal carotid stenosis, without surgery there is a 5% yearly risk of cerebral infarction such that carotid endarterectomy possibly appears warranted. In contrast, in association with asymptomatic internal carotid stenosis, that is, in the absence of any symptoms indicative of cerebral hypoperfusion, based on several recent prospective studies, the yearly rate of cerebral infarction is 1 to 2% and, consequently, less than that of the prophylactic surgical intervention. Additionally, carotid endarterectomy does not render complete protection against stroke and the follow-up curves for the respective treatments do not differ meaningfully, even during longterm observation. Accordingly, for asymptomatic internal carotid stenosis, the indication for surgery has not been clearly established. Among those with asymptomatic carotid stenosis, there may be a subgroup of individuals with high-grade luminal obstruction or multiple vessel disease, who according to several studies, appear to be at a higher risk of subsequent complications even though this has not yet been confirmed by prospective, randomized studies.(ABSTRACT TRUNCATED AT 250 WORDS)