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Erschienen in:
01.02.2013 | Diagnostic Neuroradiology
Distal hyperintense vessels on FLAIR images predict large-artery stenosis in patients with transient ischemic attack
Erschienen in: Neuroradiology | Ausgabe 2/2013
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Introduction
Distal hyperintense vessels (DHV) are frequently detected by fluid-attenuated inversion recovery (FLAIR) imaging in patients with acute ischemic stroke. Despite its relevance to patient care outcomes, the presence of DHV has not been evaluated in patients with transient ischemic attack (TIA).
Methods
We performed a retrospective analysis of all TIA patients admitted to the study hospital from 2006 to 2010 who had undergone magnetic resonance imaging (MRI) within 24 h of symptom onset followed by further intracranial and extracranial vascular imaging. We then analyzed the relationship between DHV, large artery severe stenosis or occlusion (LASO), and clinical presentation.
Results
Forty-three TIA patients were enrolled in this study. DHV signals on FLAIR images were positive in 14 (33 %) patients. Patients with DHV were significantly more likely to have severe stenosis or occlusion in intracranial (P = 0.01) and extracranial vessels (P = 0.04) than patients without DHV. DHV was associated independently with LASO (odds ratio = 6.1; 95 % CI, 1.2–31.5).
Conclusion
Evaluation of DHV signals on FLAIR images may facilitate prediction of LASO in TIA patients and therefore enable prompt vascular assessment.