Results 111 to 120 of about 29,744 (154)
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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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The Variability of Cerebrovascular Reactivity with Posture and Time
Journal of Neurosurgical Anesthesiology, 1996Transcranial Doppler (TCD) ultrasonography has been used in a variety of clinical contexts to assess cerebrovascular reserve by measuring carbon dioxide reactivity. Reproducibility with time and altered position of the patient is examined in the present study. Carbon dioxide reactivity was determined in 10 healthy volunteers using TCD.
T S, Mayberg +3 more
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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 in Normal Pregnancy and Preeclampsia
Obstetrics & Gynecology, 2001To compare cerebrovascular reactivity in normotensive and preeclamptic pregnant women.Transcranial Doppler ultrasound was used to measure peak, end-diastolic, and mean velocities in the middle cerebral arteries of 45 normotensive and 36 preeclamptic women in the third trimester.
S, Riskin-Mashiah +3 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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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 Reactivity in Migraine With and Without Aura
Headache: The Journal of Head and Face Pain, 1996Abnormal cerebrovascular regulation has been implicated in the pathogenesis of migraine. Our aim in this study was to evaluate cerebrovascular reactivity to different stimulations in migraine with and without aura. Using bilateral transcranial Doppler, the changes of flow velocity during hypercapnia and mental and motor activity were measured in the ...
M, Silvestrini +4 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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Cerebrovascular reactivity and dynamic autoregulation in tetraplegia
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 2010Humans with spinal cord injury have impaired cardiovascular function proportional to the level and completeness of the lesion. The effect on cerebrovascular function is unclear, especially for high-level lesions. The purpose of this study was to evaluate the integrity of dynamic cerebral autoregulation (CA) and the cerebrovascular reactivity in ...
Luke C, Wilson +5 more
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Cerebrovascular Reactivity to Carbon Dioxide in Alzheimer's Disease [PDF]
Journal of Alzheimer's Disease, 2013 There is growing evidence that cerebrovascular reactivity to carbon dioxide (CVRCO2) is impaired in Alzheimer's disease (AD). Preclinical and animal studies suggest chronic hypercontractility in brain vessels in AD. We review (a) preclinical studies of mechanisms for impaired CVRCO2 in AD; (b) clinical studies of cerebrovascular function in subjects ...
Lidia, Glodzik +3 more
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