No evidence that severity of stroke in internal carotid occlusion is related to collateral arteries

Journal of Neurology, Neurosurgery, and Psychiatry
G E MeadLothian Stroke Registry Study Group


The neurological effects of internal carotid artery (ICA) occlusion vary between patients. The authors investigated whether the severity of symptoms in a large group of patients with ipsilateral or/and contralateral ICA occlusion at presentation with ocular or cerebral ischaemic symptoms could be explained by patency of other extra or intracranial arteries to act as collateral pathways. The authors prospectively identified all patients (n = 2881) with stroke, cerebral transient ischaemic attack (TIA), retinal artery occlusion (RAO), and amaurosis fugax (AFx) presenting to our hospital over five years, obtained detailed history and examination, and examined the intra and extracranial arteries with carotid and colour-power transcranial Doppler ultrasound. For this analysis, all those with intracranial haemorrhage on brain imaging and cerebral events without brain imaging were excluded. Among 2228/2397 patients with brain imaging (1713 ischaemic strokes, 401 cerebral TIAs, 193 AFx, and 90 RAO) who underwent carotid Doppler, 195 (9%) had ICA occlusion. Among those patients with cortical events, disease in potential collateral arteries (contralateral ICA, external carotid, ipsilateral or contralateral vertebral or intracranial arter...Continue Reading


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Related Concepts

Internal Carotid Artery Diseases
Internal Carotid Artery Structure
Brain Ischemia
Crescendo Transient Ischemic Attacks
Structure of Central Retinal Artery
Severity of Illness Index
Ultrasonography, Doppler, Transcranial
Acute Cerebrovascular Accidents
Amaurosis Fugax

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