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Imaging-based decision making in thrombolytic therapy for ischemic stroke: present status.
Peter D Schellinger1, Jochen B Fiebach, Werner Hacke
1Department of Neurology, University of Heidelberg, Heidelberg, Germany. Peter_Schellinger@med.uni-heidelberg.de
Stroke
|February 8, 2003
Summary
Advanced imaging can help determine eligibility for thrombolytic therapy in acute stroke patients beyond the standard 3-hour window. Identifying vessel occlusion and salvageable brain tissue allows for extended treatment times with informed consent.
Area of Science:
- Neurology
- Radiology
- Emergency Medicine
Background:
- Thrombolysis is the standard treatment for acute stroke within 3 hours.
- Evidence suggests potential benefits between 3 to 6 hours, necessitating improved patient selection.
- Current guidelines lack specific criteria for extended thrombolysis eligibility.
Purpose of the Study:
- To review current imaging techniques for acute stroke assessment.
- To propose a comprehensive diagnostic approach challenging rigid therapeutic time windows.
- To evaluate the role of advanced imaging in patient selection for extended thrombolysis.
Main Methods:
- Comprehensive literature review of stroke imaging modalities.
- Analysis of Doppler ultrasound (DU), CT, MRI, and advanced techniques (perfusion CT, DWI, PWI, CTA, MRA, CTA-SI).
- Evaluation of diagnostic accuracy for vessel occlusion and infarct core demarcation.
Main Results:
- Advanced imaging (DWI/PWI/MRA or CT/CTA/CTA-SI) is crucial for identifying vessel occlusion and salvageable tissue.
- These techniques enable precise demarcation of infarct core and at-risk tissue.
- Information on vessel occlusion is essential for thrombolysis in the 3- to 6-hour window.
Conclusions:
- Advanced imaging techniques are vital for informed thrombolysis decisions beyond 3 hours.
- Accurate assessment of infarct core and salvageable tissue allows for extended therapeutic windows.
- Comprehensive informed consent is mandatory for thrombolysis outside established timeframes.