Multimodality Monitoring, Inflammation, and Neuroregeneration in Subarachnoid Hemorrhage
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BACKGROUND: Stroke, including subarachnoid hemorrhage (SAH), is one of the leading causes of morbidity and mortality worldwide. The mortality rate of poor-grade SAH ranges from 34% to 52%. In an attempt to improve SAH outcomes, clinical research on multimodality monitoring has been performed, as has basic science research on inflammation and neuroregeneration (which can occur due to injury-induced neurogenesis). Nevertheless, the current literature does not focus on the integrated study of these fields. Multimodality monitoring corresponds to physiological data obtained during clinical management by both noninvasive and invasive methods. Regarding inflammation and neuroregeneration, evidence suggests that, in all types of stroke, a proinflammatory phase and an anti-inflammatory phase occur consecutively; these phases affect neurogenesis, which is also influenced by other pathophysiological features of stroke, such as ischemia, seizures, and spreading depression. OBJECTIVE: To assess whether injury-induced neurogenesis is a prognostic factor in poor-grade SAH that can be monitored and modulated. METHODS: We propose a protocol for multimodality monitoring-guided hypothermia in poor-grade SAH in which cellular and molecular markers of inflammation and neuroregeneration can be monitored in parallel with clinical and multimodal data. EXPECTED OUTCOMES: This study may reveal correlations between markers of inflammation and neurogenesis in blood and cerebrospinal fluid, based on clinical and multimodality monitoring parameters. DISCUSSION: This protocol has the potential to lead to new therapies for acute, diffuse, and severe brain diseases. ABBREVIATIONS: BBB, blood-brain barrier CPP, cerebral perfusion pressure EEG, electroencephalography ICP, intracranial pressure IL, interleukin MCA, middle cerebral artery SAH, subarachnoid hemorrhage SD, spreading depression SGZ, subgranular zone SVZ, subventricular zone TCD, transcranial DopplerOriginal Article: http://journals.lww.com/neurosurgery/Fulltext/2014/12000/Multimodality_Monitoring,_Inflammation,_and.18.aspx
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