Results 201 to 210 of about 3,313,018 (220)

Evaluation of impaired dynamic cerebral autoregulation by the Mueller manoeuvre

Clinical Physiology, 2001
Arterial blood pressure (ABP) shows polyphasic changes during the Mueller manoeuvre (voluntary negative intrathoracic pressure). The aim of the present study was to investigate (1) whether these changes could be applied to detect impaired dynamic cerebral autoregulation (dCA) in carotid stenosis and (2) whether the degree of indicated impairment ...
Reinhard, Matthias, Hetzel, Andreas, Lauk, Michael, Lücking, Carl H.   +3 more
openaire   +3 more sources

Effect of head‐upright tilt on the dynamic of cerebral autoregulation

Clinical Physiology, 1998
The effect of head‐upright tilting on the rate of cerebral autoregulation was studied in 12 healthy volunteers (nine men and three women; age range 20–36 years). The dynamics of cerebral autoregulation was determined from the rate of change in cerebral resistance (RoR) during a drop in arterial blood pressure induced by rapid deflation of a 3‐min ...
Lefthériotis, Georges, Preckel, Marie-Pierre, Fizanne, Lionel, Victor, J, Dupuis, Jean-Marc, Saumet, Jean-Louis   +5 more
openaire   +3 more sources

Unconstrained parameter estimation for assessment of dynamic cerebral autoregulation

Physiological Measurement, 2008
Measurement of dynamic cerebral autoregulation (CA), the transient response of cerebral blood flow (CBF) to changes in arterial blood pressure (ABP), has been performed with an index of autoregulation (ARI), related to the parameters of a second-order differential equation model, namely gain (K), damping factor (D) and time constant (T). Limitations of
Chacón, M, Nuñez, N, Henríquez, C, Panerai, RB   +3 more
openaire   +3 more sources

Variability of time-domain indices of dynamic cerebral autoregulation

Physiological Measurement, 2003
The intra- and inter-subject variabilities of the cerebral dynamic autoregulatory index (ARI) were studied in a group of 14 healthy subjects aged 23-51 years. An alternative index, derived from autoregressive-moving average (ARMA) modelling of the arterial blood pressure (ABP)-cerebral blood flow velocity (CBFV) dynamic relationship, named ARMA-ARI, is
Panerai, RB, Eames, PJ, Potter, JF
openaire   +3 more sources

Nonlinear modeling of dynamic cerebral autoregulation in humans

2000
28
Mitsis, Georgios D., Zhang, R., Levine, B. D., Marmarelis, V. Z., Mitsis, Georgios D., Zhang, R., Levine, B. D., Marmarelis, V. Z.   +7 more
openaire   +2 more sources

Review of studies on dynamic cerebral autoregulation in the acute phase of stroke and the relationship with clinical outcome

Journal of Cerebral Blood Flow and Metabolism, 2022
Li Xiong, Nils Petersen, Jatinder Minhas   +2 more
exaly  

Dynamic cerebral autoregulation under sinusoidal gravitational loading.

Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology, 2002
Dynamic cerebral autoregulation (CA) has been studied previously using spectral analysis of oscillations in arterial blood pressure (ABP) and cerebral blood flow velocity (CBFV). The dynamics of the CA can be modeled as a high-pass filter. The purpose of this study is to compare CA of blood pressure oscillations induced by gravitational loading to CA ...
Gisolf, J., Stok, W. J., Oei, S. I., Immink, R. V., vanLieshout, J. J., Karemaker, J. M.   +5 more
openaire   +2 more sources

Quantification of dynamic cerebral autoregulation: welcome to the jungle!

Clinical Autonomic Research, 2023
Lawrence Labrecque, Joel Burma, Patrice Brassard   +2 more
exaly  

Quantification of dynamic cerebral autoregulation and CO2 dynamic vasomotor reactivity impairment in essential hypertension

Journal of Applied Physiology, 2020
Vasilis Marmarelis, Dae C Shin
exaly  

Dynamic cerebral autoregulation and cerebrovascular carbon dioxide reactivity in middle and posterior cerebral arteries in young endurance-trained women

Journal of Applied Physiology, 2021
Lawrence Labrecque, Patrice Brassard, Sarah Imhoff   +2 more
exaly