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Cerebrovascular Reactivity and Concussion
Neuroimaging Clinics of North America, 2023Cerebrovascular reactivity (CVR) reflects the change in cerebral blood flow in response to vasodilatory stimuli enabling assessment of the health of the cerebral vasculature. Recent advances in the quantitative delivery of CO2 stimuli with computer-controlled sequential gas delivery have enabled mapping of the speed and magnitude of response to flow ...
Erin T, Wong +3 more
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Circadian cerebrovascular reactivity to CO2
Respiratory Physiology & Neurobiology, 2014Cerebrovascular reactivity (CVR) assesses the ability of the cerebral vasculature to adjust cerebral blood flow in response to changes in arterial carbon dioxide (CO2), and is used as an indicator of cerebrovascular health. A common method of estimating CVR is to measure the increase in blood flow velocity of the middle cerebral artery (MCAv), using ...
J. Strohm, J. Duffin, J.A. Fisher
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Cerebrovascular reactivity in multiple sclerosis patients
Multiple Sclerosis Journal, 2007A close relationship between multiple sclerosis (MS) lesions and the cerebral vasculature has long been recognised. Some studies have suggested that vascular endothelial cell activation might be an early event in the evolution of MS, and demyelisation may have an ischemic basis in this condition.
Uzuner, Nevzat +2 more
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Cerebrovascular reactivity: rat studies in rheoencephalography
Physiological Measurement, 2004Here we describe a correlative study of cerebral blood flow (CBF) using global, local CBF and carotid flow measurements. The primary objective of this study was to establish a relationship between REG and CBF autoregulation. Rheoencephalography (REG), a rarely used method to measure CBF, is a potential tool of non-invasive continuous life sign ...
M, Bodo, F J, Pearce, R A, Armonda
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Cerebrovascular Autoregulation and Monitoring of Cerebrovascular Reactivity
2013Cerebrovascular autoregulation and reactivity are two important processes which maintain CBF at metabolically appropriate levels in response to fluctuations in cerebral perfusion pressure. Additionally, intact vascular reactivity protects the cerebral capillary bed against excessive hydrostatic pressures that may precipitate vasogenic oedema.
Philip M. Lewis +3 more
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Reduction of cerebrovascular reactivity during hypercapnia
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1982The effects on cerebral blood flow of alpha- or beta-adrenergic receptor stimulation of cerebral vessels were examined in 13 unanesthetized goats before and during hypercapnia produced by inhalation of 10% CO2 in air. This procedure increased the PCO2 from 34 to 52 and was accompanied by a fall in pH from 7.39 to 7.26.
A L, López de Pablo +4 more
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Assessment of Cerebrovascular Reactivity
2018Such factors as cerebrovascular reserve, condition of cardiac hemodynamics, systemic blood pressure, and rheological parameters of blood have a big influence on cerebral circulation.
Fridon Todua, Dudana Gachechiladze
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Lysophosphatidic acid alters cerebrovascular reactivity in piglets
American Journal of Physiology-Heart and Circulatory Physiology, 1995Effects of the lipid mediator lysophosphatidic acid (LPA) were studied on the cerebral circulation of newborn pigs using closed cranial windows. Topical application of synthetic LPA caused dose-dependent vasoconstriction and inhibited vasodilation to hypercapnia and isoproterenol.
G, Tigyi +5 more
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