Abstract
Recent studies have opened a new era in treatment of acute ischemic stroke, enabling thrombolysis or thrombectomy far beyond the standard therapeutic “time windows”. These therapeutic protocols are built on various combinations of perfusion parameters, lesion volume, and neurological assessment. However, on top of the brain perfusion, there are other multiple factors that might modify the probability of neuronal apoptosis and necrosis following focal cerebral ischemia. We hypothesize that a diagnostic approach with measurements of selected biochemical parameters in the brain, in addition to those based solely on perfusion or MR diffusion, might allow for more personalized management protocols. Moreover, some local processes in the brain, triggered by acute ischemia or its consequences other than hypoperfusion directly, like, for example, excitotoxicity, might lead to apoptosis of the cells in the brain localized also beyond the area of hypoperfusion. This phenomenon might be responsible for the expansion of the brain damage much beyond the initial perfusion deficit or beyond the initial diffusion (DWI) restriction area, reported for example in T2W or FLAIR MRI in some stroke patients who have no other reasons to deteriorate (a reverse DWI – T2W / FLAIR, a reverse perfusion – DWI, or a reverse DWI – DWI mismatch).
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Karaszewski, B., Jabłoński, B. & Żukowicz, W. The salvageable brain in acute ischemic stroke. The concept of a reverse mismatch: a mini-review. Metab Brain Dis 35, 237–240 (2020). https://doi.org/10.1007/s11011-019-00517-x
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DOI: https://doi.org/10.1007/s11011-019-00517-x