Abstract
Instantaneous orthostatic hypotension (INOH) is one of the main types of orthostatic dysregulation in children and adolescents. In patients with INOH arterial pressure drops considerably after active standing and is slow to recover. We investigated changes in cerebral oxygenation in the bilateral prefrontal cortex during an active standing test in juvenile INOH patients to evaluate changes in cerebral oxygen metabolism. We enrolled 82 INOH patients (mean age 13.8 ± 2.2 years, 52 mild and 30 severe patients) at Nihon University Itabashi Hospital from October 2013 to April 2018. We measured cerebral oxygenated hemoglobin, deoxygenated hemoglobin, and total hemoglobin levels in the bilateral prefrontal cortex using near-infrared spectroscopy during an active standing test. In severe INOH patients, cerebral oxygenation of the right prefrontal cortex remained constant when blood pressure dropped; however, de-oxy-Hb significantly increased. These findings confirm that there is asymmetrical autoregulation between the right and left prefrontal cortex.
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Ishii, W. et al. (2020). Cerebral Autoregulation During Active Standing Test in Juvenile Patients with Instantaneous Orthostatic Hypotension. In: Ryu, PD., LaManna, J., Harrison, D., Lee, SS. (eds) Oxygen Transport to Tissue XLI. Advances in Experimental Medicine and Biology, vol 1232. Springer, Cham. https://doi.org/10.1007/978-3-030-34461-0_11
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DOI: https://doi.org/10.1007/978-3-030-34461-0_11
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