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Stroke in patients with occlusion of the internal carotid artery: options for treatment
John Ih Lee1, Sebastian Jander, Alexander Oberhuber
1LVR-Klinikum Düsseldorf, University Hospital Düsseldorf, Düsseldorf, Germany.
Insights
Internal carotid artery (ICA) occlusion can cause ischemic stroke. Treatment focuses on restoring blood flow and preventing future strokes, though the role of bypass surgery for chronic occlusion remains unclear.
Area of Science:
- Neurology
- Vascular Surgery
- Interventional Neuroradiology
Background:
- Ischemic stroke can result from internal carotid artery (ICA) occlusion, with causes varying by age (e.g., dissection in younger patients, embolism/thrombosis in older patients).
- Chronic ICA occlusion may lead to ischemic infarcts due to hemodynamic compromise, prompting consideration of extracranial-intracranial bypass surgery.
- Contralateral ICA occlusion presents complex treatment challenges with increased risks for interventions.
Purpose of the Study:
- To review the causes and management strategies for ischemic stroke in patients with ipsilateral or contralateral internal carotid artery (ICA) occlusion.
- To discuss the role of interventional techniques, including recanalization and bypass surgery, in managing ICA occlusion.
- To highlight the importance of medical treatment for secondary stroke prevention in these patient populations.
Main Methods:
- Review of existing literature on ischemic stroke associated with internal carotid artery (ICA) occlusion.
- Analysis of causes, diagnostic imaging findings, and treatment outcomes for carotid artery occlusion.
- Evaluation of interventional and medical management strategies for stroke prevention.
Main Results:
- Ipsilateral ICA occlusion causes include dissection, embolism, and thrombosis, often requiring recanalization for blood flow restoration.
- The efficacy of extracranial-intracranial bypass surgery for chronic ICA occlusion and hemodynamic compromise is still under investigation.
- Medical management is crucial for secondary stroke prevention in all cases of carotid artery occlusion.
Conclusions:
- Prompt diagnosis and management of ICA occlusion are essential for preventing recurrent ischemic strokes.
- Interventional strategies aim to restore cerebral blood flow, but their long-term benefits and risks require further evaluation.
- Comprehensive stroke prevention, including medical therapy, remains a cornerstone in managing patients with carotid artery occlusion.
Abstract:
Ischemic stroke may occur in patients in whom vascular imaging shows the ipsilateral internal carotid artery (ICA) to be occluded. In younger patients this is often due to carotid artery dissection, while in older people this most likely results from cardiac embolism or thrombosis secondary to high-grade stenosis at the carotid bifurcation. Interventional techniques aim at recanalization of the carotid artery for early restoration of cerebral blood flow and secondary prevention of future strokes. In chronic ICA occlusion the ischemic infarct may be related to hemodynamic compromise. In this situation, extracranial-intracranial bypass surgery was introduced, but its role remains still unclear. Ischemic stroke may also occur in patients with a chronic occlusion of the contralateral ICA. This situation demands the usual stroke treatment, but surgical and neuroradiological interventions face a higher risk than unilateral vascular pathology. Medical treatment supports stroke prevention in carotid artery occlusion.
