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Titolo:
Significance of hyperintense vessels on FLAIR MRI in acute stroke
Autore:
Kamran, S; Bates, V; Bakshi, R; Wright, P; Kinkel, W; Miletich, R;
Indirizzi:
SUNY Buffalo, Millard Fillmore Hosp, Sch Med & Biomed Sci, Lucy Dent Imaging Res Ctr, Buffalo, NY 14260 USA SUNY Buffalo Buffalo NY USA 14260 Imaging Res Ctr, Buffalo, NY 14260 USA
Titolo Testata:
NEUROLOGY
fascicolo: 2, volume: 55, anno: 2000,
pagine: 265 - 269
SICI:
0028-3878(20000725)55:2<265:SOHVOF>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
INITIAL CLINICAL-EXPERIENCE; INVERSION-RECOVERY FLAIR; CEREBRAL INFARCTION; MAGNETIC-RESONANCE; CEREBROVASCULAR-DISEASE; ENHANCEMENT; ISCHEMIA; SEQUENCES; BLOOD; BRAIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Kamran, S 280 Pasadena Dr, Lexington, KY 40503 USA 280 Pasadena Dr Lexington KY USA 40503 Lexington, KY 40503 USA
Citazione:
S. Kamran et al., "Significance of hyperintense vessels on FLAIR MRI in acute stroke", NEUROLOGY, 55(2), 2000, pp. 265-269

Abstract

Objective: To describe hyperintense vessels sign (HVS) in patients with acute stroke on fluid-attenuated inversion recovery (FLAIR) MRI and determineits clinical significance and utility. Background: Enhancement of vessels on postcontrast MRI in patients with acute stroke is considered an indicator of early brain ischemia. Recently, the FLAIR technique has shown promise in earlier and better detection of ischemic brain parenchymal lesions. Methods: Two observers retrospectively reviewed 304 MRI of patients with strokeand identified 30 patients with acute middle cerebral artery stroke and HVS on FLAIR obtained within 24 hours of symptom onset. These patients were evaluated with contrast-enhanced MRI (n = 9), MR angiography of carotid and intracranial circulation (n = 30), cerebral angiography (n = 8), transcranial Doppler (n = 17), and SPECT (n = 16). The extent of HVS was compared with final infarct size and NIH Stroke Scale score. Results: HVS on FLAIR was seen in 10% of the patients with acute stroke. HVS was associated with large vessel occlusion or severe stenosis (> 90%). Intravascular enhancement oncontrast MRI was observed in vessels that were hyperintense on FLAIR. Bothcortical and subcortical infarcts demonstrated HVS. MR angiographic and cerebral angiographic findings of large vessel occlusion or severe stenosis (> 90%), slow flow, low velocities by transcranial Doppler, and hypoperfusion on SPECT correlated with HVS. HVS was the earliest ischemic change in three patients scanned within 3 hours of ictus. Final infarct size was smallerthan the area showing HVS in all patients. Conclusion: HVS on FLAIR MRI isan indicator of slow flow and early ischemia as a result of large vessel occlusion or stenosis and inadequacy of collateral circulation. HVS does notmean that infarction has occurred but indicates brain tissue at risk of infarction. It should prompt consideration of revascularization and flow augmentation strategies.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 01:21:52