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2 results

  • An Important Pediatric Stroke Mimic: Hemiplegic Migraine

  • Michael T. Jurkiewicz, Arastoo Vossough, Avrum N. Pollock
  • Journal:
    Canadian Journal of Neurological Sciences / Volume 47 / Issue 2 / March 2020
    Published online by Cambridge University Press:
    10 January 2020, pp. 235-236
    • Article
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  • Stroke is relatively rare in children but has become increasingly recognized clinically. Hemiplegic migraine (HM) is a rare subtype of migraine, with attacks typically beginning in childhood or adolescence. Attacks are characterized by migraine headaches and motor weakness, which develop over several minutes. HM may therefore mimic acute stroke; however, symptoms last less than an hour and resolve spontaneously, often without sequela.1–4 Distinction between these entities is important due to their different urgency and management. Neuroimaging is indispensible in working up patients presenting to the Emergency Department with stroke-like symptoms and can be used to distinguish between infarction and HM.

  • 26 - Imaging carotid disease: MR and CT perfusion

  • from Monitoring the local and distal effects of carotid interventions
  • Edited by Jonathan Gillard, University of Cambridge, Martin Graves, University of Cambridge, Thomas Hatsukami, University of Washington, Chun Yuan, University of Washington
  • Book:
    Carotid Disease
    Published online:
    03 December 2009
    Print publication:
    07 December 2006, pp 358-371

  • Summary

    Determination of the actual cerebral hemodynamical status at the tissue level in patients with carotid artery disease remains one of the potential methods to determine the risk for recurrent, hemodynamically induced, symptoms in patients with carotid artery disease. Magnetic resonance imaging (MRI) offers two different approaches to measure the cerebral perfusion. The first technique, arterial spin labeling (ASL), exploits the water in blood as an endogenous tracer. Dynamic susceptibility contrast MRI (DSC-MRI or MR bolus tracking) is the alternative method. This method uses an intravenous injection of contrast agent, applied as an exogenous tracer. Both techniques have been used to study the CBF in patients with stenotic artery disease, showing their ability to provide important information on the hemodynamic status. Perfusion computed tomography (CT) is useful to evaluate the hemodynamic state of patients with chronic major cerebral artery occlusive disorders.