Results 131 to 140 of about 38,746 (266)

Assessment of Autoregulation of the Cerebral Circulation during Acute Lung Injury in a Neonatal Porcine Model

Children
In neonates with acute lung injury (ALI), targeting lower oxygenation saturations is suggested to limit oxygen toxicity while maintaining vital organ function.
Asli Memisoglu, Martha Hinton, Yasser Elsayed, Ruth Graham, Shyamala Dakshinamurti   +4 more
doaj   +1 more source

Idiopathic orthostatic hypotension: Recent data (eleven cases) and review of the literature [PDF]

Eight cases of Shy-Drager syndrome and three of Bradbury-Eggleston idiopathic orthostatic hypotension were examined. In all cases, examination of circulatory reflexes showed major dysfunction of the sympathetic vasoconstrictor system.
Annat, G., Boisson, D., Devic, M., Holzhapfel, L., Levrat, R., Michel, D., Ninet, J., Peyrin, L., Schott, B., Vincent, M.   +9 more
core   +1 more source

Cerebral Autoregulation, CSF outflow resistance and outcome following CSF diversion in Normal Pressure Hydrocephalus [PDF]

, 2017
Afroditi D. Lalou, Marek Czosnyka, Joseph E. Donnelly, John D. Pickard, Eva Nabbanja, Nicole C. Keong, Matthew Garnett, Zofia Czosnyka   +7 more
openalex   +1 more source

Impaired dynamic cerebral autoregulation is associated with the severity of neuroimaging features of cerebral small vessel disease [PDF]

, 2021
Zhaojun Liu, Hongyin Ma, Zhen‐Ni Guo, Le Wang, Yang Qu, Lei Fan, Xingliang Liu, Jie Liu, Yuanyuan Zhu, Yi Yang   +9 more
openalex   +1 more source

On‐feet isometric bracing maintains cerebral arterial blood velocity during lower body negative pressure via preload augmentation

Experimental Physiology, EarlyView.
Abstract Orthostatic stress reduces venous return and stroke volume (SV), risking cerebral hypoperfusion despite autonomic compensation. Although lower‐limb counterpressure manoeuvres improve cerebral perfusion in upright posture, their effects on cerebral blood velocity (CBV) during lower‐body negative pressure (LBNP) and the associated mechanisms are
Jun Sugawara, Marina Fukuie, Tsubasa Tomoto, Takashi Tarumi, Ai Hirasawa, Shigeki Shibata   +5 more
wiley   +1 more source

Haemodynamic‐energetic mechanism of sudden cardiac death in severe aortic stenosis: A modelling study

The Journal of Physiology, EarlyView.
Abstract figure legend A sudden decrease in total peripheral resistance (TPR), as observed during vasovagal syncope, leads to a reduction in aortic systolic pressure (AO pressure) and afterload. In healthy individuals, the consequent decrease in left ventricular systolic pressure (LV pressure) lowers stroke work and myocardial energy expenditure.
Martin Dvoulety, Michal Sitina
wiley   +1 more source

Cerebral Oxygenation and Autoregulation in Very Preterm Infants Developing IVH During the Transitional Period: A Pilot Study [PDF]

, 2020
Anna Giulia Cimatti, Silvia Martini, Silvia Galletti, Francesca Vitali, Arianna Aceti, Giulia Frabboni, Giacomo Faldella, Luigi Corvaglia   +7 more
openalex   +1 more source

Astrocytes: Orchestrators of brain gas exchange and oxygen homeostasis

The Journal of Physiology, EarlyView.
Abstract figure legend Oxygen and carbon dioxide enter the body via breathing; in the brain astrocytes play a key role balancing oxygen delivery with carbon dioxide removal. Abstract If we consider neurons like muscles during exercise, the demand for oxygen (O2) and carbon dioxide (CO2) elimination is constantly changing.
Isabel N. Christie
wiley   +1 more source

Energetic microdomains and the vascular control of neuronal and muscle excitability: Toward a unified model

The Journal of Physiology, EarlyView.
Abstract figure legend The capillary–mitochondria–ion channel (CMIC) axis scales structural resources to match functional workload. (Left) In settings of restricted energetic capacity (e.g. cortical neurons), sparse capillary networks and modest mitochondrial pools set a lower energetic ceiling, sufficient to support phasic, low‐workload excitability. (
L. Fernando Santana, Scott Earley
wiley   +1 more source

Cooling down for going up: Could selective ‘brain chilling’ mitigate high‐altitude illness?

Experimental Physiology, EarlyView.
Adnan Haq, Damian M. Bailey
wiley   +1 more source