Results 31 to 40 of about 3,313,018 (220)

Dynamic cerebral autoregulation is acutely impaired during maximal apnoea in trained divers.

PLoS ONE, 2014
AimsTo examine whether dynamic cerebral autoregulation is acutely impaired during maximal voluntary apnoea in trained divers.MethodsMean arterial pressure (MAP), cerebral blood flow-velocity (CBFV) and end-tidal partial pressures of O2 and CO2 (PETO2 and
Troy J Cross, Justin J Kavanagh, Toni Breskovic, Bruce D Johnson, Zeljko Dujic   +4 more
doaj   +1 more source

Dynamic Cerebral Autoregulation in Pregnancy and the Risk of Preeclampsia [PDF]

Hypertension, 2014
Preeclampsia may affect severely the cerebral circulation leading to impairment of cerebral autoregulation, edema, and ischemia. It is not known whether impaired autoregulation occurs before the clinical onset of preeclampsia, and whether this can predict the occurrence of preeclampsia. Seventy-two women at 25 to 28 weeks of gestation were
Janzarik, Wibke G, Ehlers, Elena, Ehmann, Renata, Gerds, Thomas A, Schork, Joscha, Mayer, Sebastian, Gabriel, Boris, Weiller, Cornelius, Prömpeler, Heinrich, Reinhard, Matthias   +9 more
openaire   +3 more sources

Optimising the assessment of cerebral autoregulation from black box models [PDF]

, 2014
Cerebral autoregulation (CA) mechanisms maintain blood flow approximately stable despite changes in arterial blood pressure. Mathematical models that characterise this system have been used extensively in the quantitative assessment of function ...
Kouchakpour, H., Angarita-Jaimes, N., Panerai, R.B., Simpson, D.M., Liu, J.   +4 more
core   +1 more source

The upper frequency limit of dynamic cerebral autoregulation [PDF]

The Journal of Physiology, 2019
Key points Dynamic cerebral autoregulation (CA) is expressed by the temporal pattern of cerebral blood flow (CBF) recovery following a sudden change in arterial blood pressure (BP). Transfer function analysis of BP as input and CBF velocity as output can express dynamic CA through its amplitude (or gain) and phase frequency responses.
Ronney B. Panerai, Thompson G. Robinson, Jatinder S. Minhas   +2 more
openaire   +2 more sources

Impaired Dynamic Cerebral Autoregulation in Moyamoya Disease [PDF]

CNS Neuroscience & Therapeutics, 2013
Moyamoya disease (MMD) is a cerebrovascular disease with unknown etiology, characterized by progressive stenosis of the internal carotid artery (ICA). The predominant feature of MMD is the “puff-of-smoke” vessels at the base of the brain, where the pathology of vascular network known as the dilated perforating arteries function as collateral pathways ...
Jie, Chen, Jia, Liu, Lian, Duan, Ren, Xu, Yi-Qin, Han, Wei-Hai, Xu, Li-Ying, Cui, Shan, Gao   +7 more
openaire   +2 more sources

A network-based model of dynamic cerebral autoregulation

Microvascular Research, 2023
Cerebrovascular diseases continue to be one of the leading causes of morbidity and mortality in humans. Abnormalities in dynamic cerebral autoregulation (dCA) have been implicated in many of these disease conditions. Accurate models are therefore needed to better understand the complex pathophysiology behind impaired dCA.
Ali, Daher, Stephen, Payne
openaire   +2 more sources

Cerebral Augmentation Effect Induced by External Counterpulsation Is Not Related to Impaired Dynamic Cerebral Autoregulation in Ischemic Stroke

Frontiers in Neurology, 2022
Background and PurposeDynamic cerebral autoregulation is impaired after ischemic stroke. External counterpulsation (ECP) augments the cerebral blood flow of patients with ischemic stroke by elevation of blood pressure (BP).
Li Xiong, Li Xiong, Xiangyan Chen, Jia Liu, Lawrence Ka Sing Wong, Thomas W. Leung   +5 more
doaj   +1 more source

Reliability of cerebral autoregulation using different measures of perfusion pressure in patients with subarachnoid hemorrhage

Physiological Reports, 2022
Dynamic cerebral autoregulation to spontaneous fluctuations in cerebral perfusion pressure (CPP) is often assessed by transcranial Doppler (TCD) in the time domain, yielding primarily the mean flow index (Mx), or in the frequency domain using transfer ...
Markus Harboe Olsen, Tenna Capion, Christian Gunge Riberholt, Søren Bache, Ronan M. G. Berg, Kirsten Møller   +5 more
doaj   +1 more source

Transfer function analysis of dynamic cerebral autoregulation: A white paper from the International Cerebral Autoregulation Research Network

, 2015
Cerebral autoregulation is the intrinsic ability of the brain to maintain adequate cerebral perfusion in the presence of blood pressure changes. A large number of methods to assess the quality of cerebral autoregulation have been proposed over the last ...
Ainslie, Philip N., Ragauskas, Arminas, Van Lieshout, Johannes J., Tzeng, Yu Chieh, Serrador, Jorge, Iwasaki, Kenichi, Puppo, Corina, Semenyuti, Vladimir, Novak, Vera, Shin, Dae, Simpson, David M., Gommer, Erik, Liu, Xiuyun, Hu, Han Hwa, Zhang, Rong, Bailey, Damian, Claassen, Jurgen Ahr, Smielewski, Peter, Summers, Paul, Wang, Cheng Yen, Potter, John, Karemaker, John M., Meel-Van Den Abeelen, Aisha Ss, Meel-Van Den Abeelen, Aisha S.S., Mitsis, Georgios D., Czosnyka, Marek, Yelicich, Bernardo, Müller, Martin, Aliev, Vugar, Brassard, Patrice, Aries, Marcel, Marmarelis, Vasilis, Panerai, Ronney B., Alexander Caicedo Dorado, Caicedo Dorado, Payne, Stephen, Rickards, Caroline A.   +35 more
core   +4 more sources

Menstrual cycle and oral contraceptives influence cerebrovascular dynamics during hypercapnia

Physiological Reports, 2022
Women experience fluctuating orthostatic intolerance during the menstrual cycle, suggesting sex hormones may influence cerebral blood flow. Young (aged 18–30) healthy women, either taking oral contraceptives (OC; n = 14) or not taking OC (NOC; n = 12 ...
Tania J. Pereira, Sara Wasef, Ilana Ivry, Elnaz Assadpour, Baithat O. Adeyinka, Heather Edgell   +5 more
doaj   +1 more source