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Fluid-attenuated inversion recovery images and stroke outcome after thrombolysis

Martin Ebinger1, Anna Kufner, Ivana Galinovic

  • 1CSB, Charité-Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany. martin.ebinger@charite.de

Stroke
|October 29, 2011
PubMed
Abstract

Insights

Fluid-attenuated inversion recovery (FLAIR) hyperintensities in arteries and brain parenchyma on MRI are linked to poor outcomes after stroke thrombolysis. This easy-to-use imaging marker predicts worse functional status 3 months post-treatment.

Area of Science:

  • Neuroimaging
  • Stroke Medicine
  • Radiology

Background:

  • Acute ischemic stroke requires timely treatment like thrombolysis.
  • Assessing prognosis after thrombolysis is crucial for patient management.
  • Magnetic Resonance Imaging (MRI) offers detailed insights into brain injury.

Purpose of the Study:

  • To determine if arterial and parenchymal hyperintensities on FLAIR MRI sequences predict poor outcomes.
  • To investigate the association between specific MRI findings and functional status 3 months after thrombolysis.

Main Methods:

  • Retrospective analysis of 90 acute ischemic stroke patients undergoing MRI before and after thrombolysis.
  • Independent assessment of arterial and parenchymal FLAIR hyperintensities by blinded raters.
  • Functional outcome evaluated using the modified Rankin Scale at 3 months.

Main Results:

  • FLAIR hyperintensities were observed in 22 patients (parenchymal) and 42 patients (arterial).
  • The combined presence of arterial and parenchymal FLAIR hyperintensities occurred in 15 patients.
  • Regression analysis showed a significantly increased odds ratio (14.5) for poor outcome (mRS >2) with combined FLAIR hyperintensities (P=0.03).

Conclusions:

  • FLAIR hyperintensities in both arteries and parenchyma are a significant imaging biomarker.
  • This MRI feature is an accessible tool for predicting poor outcomes in acute ischemic stroke patients post-thrombolysis.

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