Results 181 to 190 of about 17,546 (218)
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Nonstationarity of dynamic cerebral autoregulation
Medical Engineering & Physics, 2013Dynamic cerebral autoregulation (dCA), the transient response of cerebral blood flow (CBF) to rapid changes in arterial blood pressure (BP), is usually quantified by parameters extracted from time- or frequency-domain analysis. Reproducibility studies of dCA parameters and consideration of the physiological determinants of the dynamic BP-CBF ...
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Oxygen-dependent mechanisms in cerebral autoregulation
Annals of Biomedical Engineering, 1985Autoregulatory adjustments in the caliber of cerebral arterioles were studied in anesthetized cats equipped with cranial windows for the direct observation of the pial microcirculation. Increased venous pressure caused slight, but consistent, arteriolar dilation, at normal and at reduced arterial blood pressure and irrespective of whether or not ...
H A, Kontos, E P, Wei
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The Frequency-Dependent Behavior of Cerebral Autoregulation
Neurosurgery, 1990Abstract Cerebral autoregulation is a complex physiological process composed of both fast and slow components that may respond differently to different rates and patterns of blood pressure variation. To assess the temporal nature of autoregulation, transcranial Doppler velocity recordings of the middle cerebral artery obtained over ...
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Cerebral Autoregulation and Vasomotor Reactivity
2006Various aspects of the cerebral blood-flow regulation can be assessed by transcranial Doppler (TCD). This chapter describes and discusses the approaches that have been reported in the literature. The steady-state characteristics of the cerebral autoregulation can be determined by changing the blood pressure level, and calculating the response of the ...
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Hypoglycemia and Cerebral Autoregulation
Journal of Neurosurgical Anesthesiology, 1989F. E. Sieber +4 more
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Transcranial Doppler for evaluation of cerebral autoregulation
Clinical Autonomic Research, 2009Transcranial Doppler ultrasound (TCD) can measure cerebral blood flow velocity in the main intracranial vessels non-invasively and with high accuracy. Combined with the availability of non-invasive devices for continuous measurement of arterial blood pressure, the relatively low cost, ease-of-use, and excellent temporal resolution of TCD have ...
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Empirical modeling of cerebral autoregulation
2013Mathematical models of the cardiovascular system and of Cerebral AutoRegulation have been employed for several years in order to describe the time course of pressures and flows changes subsequent to postural changes. The assessment of the degree of efficiency of Cerebral AutoRegulation has indeed importance in the prognosis of such conditions as ...
Panunzi Simona +3 more
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Cerebral perfusion pressure and autoregulation in eclampsia—a case control study
American Journal of Obstetrics and Gynecology, 2021Lina Bergman +2 more
exaly
Drugs and cerebral autoregulation
European Journal of Clinical Investigation, 1982openaire +2 more sources