Related Experiment Videos
[When is interventional therapy necessary for carotid stenosis?]
1Medizinische Klinik, Kantonsspital Chur. cornia.canova@ksc.gr.ch
Insights
Carotid endarterectomy effectively prevents stroke in patients with high-grade internal carotid artery stenosis (> or = 60-70%). The degree of stenosis directly correlates with surgical benefits, guiding treatment decisions for stroke prevention.
Area of Science:
- Vascular Surgery
- Neurology
- Radiology
Context:
- Internal carotid artery stenosis is a common cause of ischemic cerebrovascular events, often due to atherosclerosis.
- Carotid endarterectomy has been a long-standing surgical intervention for preventing cerebral ischemia.
- Inconsistent measurement methods for carotid stenosis on angiograms create confusion in clinical practice.
Purpose:
- To address the confusion surrounding carotid stenosis measurement on angiograms.
- To emphasize the need for comparable measurement methods and conversion equations for clinical trial data.
- To clarify the indications and benefits of carotid endarterectomy based on stenosis severity and patient symptoms.
Summary:
- Carotid endarterectomy is highly beneficial for symptomatic patients with high-grade stenosis (>= 60-70%).
- Asymptomatic patients with high-grade stenosis also experience surgical benefits that correlate with stenosis degree.
- Moderate symptomatic stenosis (50-69%) offers moderate stroke risk reduction, while <50% stenosis shows no benefit.
Impact:
- Standardized measurement techniques are crucial for applying clinical trial results to routine practice.
- Informed decisions regarding carotid endarterectomy can be made by considering stenosis severity, natural stroke history, and patient-specific factors.
- Optimizing surgical intervention for carotid stenosis can significantly reduce stroke incidence and improve patient outcomes.
Abstract:
Stenoses of the internal carotid artery are common. 20-30% of ischaemic cerebrovascular events are due to atherosclerotic lesions of carotid arteries. For many years endarterectomy has been a method for prevention of cerebral ischaemia. There is confusion about how carotid stenosis should be measured on angiograms. Since the results of clinical trials based on different measurement methods are applied to routine clinical practice, the various measurement methods must be comparable. We must know which one was used, and how to convert them by a simple arithmetical equation. Carotid endarterectomy appears to be highly beneficial in patients with recent hemispheric transient ischaemic attacks or non-disabling stroke and ipsilateral high-grade stenosis (> or = 60-70%) of the internal carotid artery. Even asymptomatic patients with high-grade stenosis benefit to some extent from surgery, and the beneficial effects correlate directly with the degree of stenosis. Endarterectomy in moderate symptomatic stenosis (50-69%) yields only a moderate reduction in stroke risk. In stenosis < 50% there is no benefit. Decisions about endarterectomy should take into account the natural history of stroke in carotid stenosis, surgical skills, and the individual patient's risk factors.