Results 261 to 270 of about 782,046 (314)

Monitoring of Cerebral Autoregulation

Neurocritical Care, 2014
Pressure autoregulation is an important hemodynamic mechanism that protects the brain against inappropriate fluctuations in cerebral blood flow in the face of changing cerebral perfusion pressure (CPP). Static autoregulation represents how far cerebrovascular resistance changes when CPP varies, and dynamic autoregulation represents how fast these ...
Czosnyka M., Miller C., Le Roux P., Menon D. K., Vespa P., Citerio G., Bader M. K., Brophy G. M., Diringer M. N., Stocchetti N., Videtta W., Armonda R., Badjatia N., Boesel J., Chesnut R., Chou S., Claassen J., De Georgia M., Figaji A., Fugate J., Helbok R., Horowitz D., Hutchinson P., Kumar M., McNett M., Naidech A., Oddo M., Olson D., O'Phelan K., Provencio J., Puppo C., Riker R., Robertson C., Schmidt J. M., Taccone F.   +34 more
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Cerebral autoregulation and anesthesia

Current Opinion in Anaesthesiology, 2009
This review will examine the recent literature on anesthesia and monitoring techniques in relation to cerebral autoregulation. We will discuss the effect of physiologic and pharmacological factors on cerebral autoregulation alongside its clinical relevance with the help of new evidence.Intravenous anesthesia, such as combination of propofol and ...
Arthur M. Lam, Armagan Dagal
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Cerebral autoregulation and ageing

Journal of Clinical Neuroscience, 2005
Little is known about the effects of ageing on cerebral autoregulation (CA). To examine the relationship between age and CA in adults, we conducted a prospective study using a non-invasive protocol without external stimuli. We studied 32 subjects, aged 23-68 years. They were assigned to a young group (28+/-5 years) and an old group (54+/-8 years).
Yam, A T, Lang, E W, Lagopoulos, Jim, Yip, K, Griffith, J, Mudaliar, Y, Dorsch, N W   +6 more
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Assessment of cerebral pressure autoregulation

Current Opinion in Anaesthesiology, 2002
Cerebral pressure autoregulation, a sensitive homeostatic mechanism important for the control of cerebral blood flow, is impaired by disease pathology and some drugs commonly used during anaesthesia. Therefore, the assessment of cerebral pressure autoregulation can help optimize cerebral blood flow in patients who have suffered neurological insults. In
RASULO, Francesco Antonio, Balestreri M, Matta B.   +2 more
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Cerebral Autoregulation and Syncope

Progress in Cardiovascular Diseases, 2007
Whatever the pathogenesis of syncope is, the ultimate common cause leading to loss of consciousness is insufficient cerebral perfusion with a critical reduction of blood flow to the reticular activating system. Brain circulation has an autoregulation system that keeps cerebral blood flow constant over a wide range of systemic blood pressures. Normally,
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Cerebral Autoregulation in Orthostatic Intolerance

Annals of the New York Academy of Sciences, 2001
Abstract: Many of the primary symptoms of orthostatic intolerance (fatigue, diminished concentration) as well as some of the premonitory symptoms of neurally mediated syncope (NMS) are thought to be due to cerebral hypoperfusion. Transcranial Doppler measurements of middle cerebral artery blood velocity (CBV) is at present the only technique for ...
Reuben Stein, Julie Benoit, Ronald Schondorf   +2 more
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Cerebral autoregulation

Acta Neuropsychiatrica, 2008
No abstract available.
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Phase dynamics in cerebral autoregulation

American Journal of Physiology-Heart and Circulatory Physiology, 2005
Complex continuous wavelet transforms are used to study the dynamics of instantaneous phase difference Δφ between the fluctuations of arterial blood pressure (ABP) and cerebral blood flow velocity (CBFV) in a middle cerebral artery. For healthy individuals, this phase difference changes slowly over time and has an almost uniform distribution for the ...
Dariusz Latka, Miroslaw Latka, Bruce J. West, Waldemar Kolodziej, Marta Glaubic-Latka, Malgorzata Turalska   +5 more
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The frequency response of cerebral autoregulation

Journal of Applied Physiology, 2013
The frequency-response of pressure autoregulation is not well delineated; therefore, the optimal frequency of arterial blood pressure (ABP) modulation for measuring autoregulation is unknown. We hypothesized that cerebrovascular autoregulation is band-limited and delineated by a cutoff frequency for which ABP variations induce cerebrovascular ...
Peter Smielewski, Marek Czosnyka, Kathleen K. Kibler, Dean B. Andropoulos, Christopher J. Rhee, Kenneth Martin Brady, Charles D. Fraser, David W. Kaczka, Craig G. Rusin, R. Blaine Easley   +9 more
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Cerebral Autoregulation

2017
The human brain is by far the most expensive organ in terms of energy expenditure in the whole body, characterized by high metabolic activity with fine regulatory mechanisms, defined as cerebral autoregulation, to ensure adequate energy substrates supply in register with brain activity.
R. Liu, S.-H. Yang
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