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Thrombolysis in wake-up stroke based on MRI mismatch.
Journal of the Neurological Sciences 2024 October 4
OBJECTIVES: Wake-up stroke (WUPS) patients can be selected to intravenous thrombolysis (IVT) treatment based on the Magnetic Resonance Imaging (MRI) mismatch concept. However, recent studies suggest the introduction of modified MRI mismatch criteria, allowing IVT in WUPS patients with a partial mismatch.
MATERIAL AND METHODS: WUPS patients treated with IVT in the NOR-TEST trial and consecutively thereafter at Stavanger University Hospital were included in this study. Patient selection for treatment was performed based on the clinical presentation and the MRI DWI/FLAIR mismatch criteria. MRI examinations were reassessed according to the modified DWI-FLAIR mismatch criteria, allowing partial mismatch. Improvement in NIHSS and mRS at 3 months were used to analyze clinical outcome, and the rate of intracranial hemorrhage (ICH) to analyze safety.
RESULTS: 78 WUPS patients were treated with IVT. Only 68 of these patients were independent pre-stroke and included in the clinical analysis. When reassessing the MRI examinations, 41 (60 %) were rated as DWI/ FLAIR mismatch, 14 (21 %) as partial mismatch and 13 (19 %) as match. The results show that the patient groups had a mRS score 0-1 at 3 months measured as primary outcome to respectively 27 (65.9 %), 11 (78.6 %) and 8 (61.5 %); (P = 0.629). The mismatch group showed the best clinical improvement (3-points NIHSS reduction, p = 0.005). No ICH was seen in any of the groups.
CONCLUSION: Our study extended the mismatch concept in clinical praxis to treat WUPS patients with partial mismatch, showing the best clinical outcome in the mismatch group.
MATERIAL AND METHODS: WUPS patients treated with IVT in the NOR-TEST trial and consecutively thereafter at Stavanger University Hospital were included in this study. Patient selection for treatment was performed based on the clinical presentation and the MRI DWI/FLAIR mismatch criteria. MRI examinations were reassessed according to the modified DWI-FLAIR mismatch criteria, allowing partial mismatch. Improvement in NIHSS and mRS at 3 months were used to analyze clinical outcome, and the rate of intracranial hemorrhage (ICH) to analyze safety.
RESULTS: 78 WUPS patients were treated with IVT. Only 68 of these patients were independent pre-stroke and included in the clinical analysis. When reassessing the MRI examinations, 41 (60 %) were rated as DWI/ FLAIR mismatch, 14 (21 %) as partial mismatch and 13 (19 %) as match. The results show that the patient groups had a mRS score 0-1 at 3 months measured as primary outcome to respectively 27 (65.9 %), 11 (78.6 %) and 8 (61.5 %); (P = 0.629). The mismatch group showed the best clinical improvement (3-points NIHSS reduction, p = 0.005). No ICH was seen in any of the groups.
CONCLUSION: Our study extended the mismatch concept in clinical praxis to treat WUPS patients with partial mismatch, showing the best clinical outcome in the mismatch group.
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