Journal of magnetic resonance imaging : JMRI · 2005
Evolution of lesion volume in acute stroke treated by intravenous t-PA.
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Pialat Jean-Baptiste, Wiart Marlene, Nighoghossian Norbert, Adeleine Patrice, Derex Laurent, Hermier Marc, Froment Jean-Claude, Berthezene Yves
Аннотация
PURPOSE: To determine the evolution of the ischemic lesion volumes in a population treated with tissue plasminogen activator (t-PA), MRIs were performed before treatment and 24 hours later; final infarct size was evaluated 60 days later.
MATERIALS AND METHODS: A total of 42 patients with hemispheric stroke were recruited for a thrombolytic study. Intravenous t-PA was given after MRI within the first seven hours after stroke onset. Volumes were evaluated on day 0 and day 1 with diffusion-weighted imaging (DWI), on day 60 with T2-weighted imaging (T2WI), and recanalization was assessed based on day 1 MR angiography (MRA).
RESULTS: Lesion volume increased between day 0 and day 1, and decreased between day 1 and day 60. It was lower in the group of patients with recanalization on day 1 MRA.
CONCLUSION: Volume analysis emphasizes the effectiveness of recanalization as a predictive factor for better outcome, based on final infarct size. The decrease in lesion volumes between day 1 and day 60 suggests that other factors leads to overestimation of day 1 abnormal diffusion volume. This could explain the delayed partial reversibility of the DWI abnormality.
MATERIALS AND METHODS: A total of 42 patients with hemispheric stroke were recruited for a thrombolytic study. Intravenous t-PA was given after MRI within the first seven hours after stroke onset. Volumes were evaluated on day 0 and day 1 with diffusion-weighted imaging (DWI), on day 60 with T2-weighted imaging (T2WI), and recanalization was assessed based on day 1 MR angiography (MRA).
RESULTS: Lesion volume increased between day 0 and day 1, and decreased between day 1 and day 60. It was lower in the group of patients with recanalization on day 1 MRA.
CONCLUSION: Volume analysis emphasizes the effectiveness of recanalization as a predictive factor for better outcome, based on final infarct size. The decrease in lesion volumes between day 1 and day 60 suggests that other factors leads to overestimation of day 1 abnormal diffusion volume. This could explain the delayed partial reversibility of the DWI abnormality.