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Complete occlusion of extracranial internal carotid artery: clinical features, pathophysiology, diagnosis and management
  1. Bhomraj Thanvi1,
  2. Tom Robinson2
  1. 1Department of Integrated Medicine, Glenfield General Hospital, University Hospitals of Leicester NHS Trust, Leicester, UK
  2. 2Department of Ageing and Cerebrovascular Medicine, Leicester General Hospital, University Hospitals of Leicester NHS Trust, Leicester, UK
  1. Correspondence to:
 Dr Bhomraj Thanvi
 Department of Integrated Medicine, Glenfield General Hospital, University Hospitals of Leicester NHS Trust, Leicester LE3 9QP, UK; bthanvi{at}hotmail.com

Abstract

A complete occlusion of the internal carotid artery (ICA) is an important cause of cerebrovascular disease. A never-symptomatic ICA occlusion has a relatively benign course, whereas symptomatic occlusion increases future risk of strokes. Ultrasonography, magnetic resonance imaging and contrast angiography are useful diagnostic tests, and functional imaging of the brain (eg, with positron emission tomography) helps to understand haemodynamic factors involved in the pathophysiology of brain ischaemia. Recently, there has been a resurgence of interest in the role of extracranial–intracranial bypass surgery for the treatment of completely occluded ICA. With advances in the measurement of cerebral haemodynamics, it may be possible to identify high-risk patients who could benefit from the bypass surgery.

  • CBF, cerebral blood flow
  • CTA, computed tomography–angiography
  • ECA, external carotid artery
  • ICA, internal carotid artery
  • MCA, middle cerebral artery
  • MRA, magnetic resonance angiography
  • OEF, oxygen extraction fraction
  • TIA, transient ischaemic attack

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Footnotes

  • Competing interests: None declared.

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