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JOURNAL ARTICLE
REVIEW
CT and MRI in the diagnosis of acute stroke and their role in thrombolysis.
Thrombosis Research 2001 September 31
Thrombolysis is an effective but potential deleterious therapy and should therefore be limited to patients with acute intracerebral vessel occlusion and salvageable tissue. MRI currently develops towards the new diagnostic standard for the selection of stroke patients eligible for acute thrombolytic treatment and acute stroke studies. Diffusion- and perfusion-weighed MRI provides diagnostic information not available from the neurological assessments or from CCT and conventional spin-echo MRI. As high-speed DWI and PWI protocols become standardized, a 15-minute integrated stroke protocol of employing echo-planar imaging (EPI) can be outinely performed in the setting of acute clinical stroke. The combination of these MR techniques is suitable to define tissue at risk of infarction that is potentially salvageable brain tissue (an estimate of the ischemic penumbra) and may respond to early recanalization even beyond 3 hours after stroke onset. The extension of the therapeutic window for thrombolytic therapy towards 6 hours in a subpopulation of acute stroke patients might open the way for the successful reperfusion therapy in more stroke patients.
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