Results 251 to 260 of about 32,185 (293)

Cerebrovascular reactivity in multiple sclerosis patients

Multiple Sclerosis Journal, 2007
A close relationship between multiple sclerosis (MS) lesions and the cerebral vasculature has long been recognised. Some studies have suggested that vascular endothelial cell activation might be an early event in the evolution of MS, and demyelisation may have an ischemic basis in this condition.
Uzuner, Nevzat, Özkan, Sezai, Çınar, Nilgün   +2 more
openaire   +3 more sources

Cerebrovascular Reactivity in Normal Pregnancy and Preeclampsia

Obstetrics & Gynecology, 2001
To compare cerebrovascular reactivity in normotensive and preeclamptic pregnant women.Transcranial Doppler ultrasound was used to measure peak, end-diastolic, and mean velocities in the middle cerebral arteries of 45 normotensive and 36 preeclamptic women in the third trimester.
S, Riskin-Mashiah, M A, Belfort, G R, Saade, J A, Herd   +3 more
openaire   +2 more sources

Cerebrovascular Autoregulation and Monitoring of Cerebrovascular Reactivity

2013
Cerebrovascular autoregulation and reactivity are two important processes which maintain CBF at metabolically appropriate levels in response to fluctuations in cerebral perfusion pressure. Additionally, intact vascular reactivity protects the cerebral capillary bed against excessive hydrostatic pressures that may precipitate vasogenic oedema.
Philip M. Lewis, Marek Czosnyka, Piotr Smielewski, John D. Pickard   +3 more
openaire   +1 more source

Cerebrovascular reactivity: rat studies in rheoencephalography

Physiological Measurement, 2004
Here we describe a correlative study of cerebral blood flow (CBF) using global, local CBF and carotid flow measurements. The primary objective of this study was to establish a relationship between REG and CBF autoregulation. Rheoencephalography (REG), a rarely used method to measure CBF, is a potential tool of non-invasive continuous life sign ...
M, Bodo, F J, Pearce, R A, Armonda
openaire   +2 more sources

Assessment of Cerebrovascular Reactivity

2018
Such factors as cerebrovascular reserve, condition of cardiac hemodynamics, systemic blood pressure, and rheological parameters of blood have a big influence on cerebral circulation.
Fridon Todua, Dudana Gachechiladze
openaire   +1 more source

Reduction of cerebrovascular reactivity during hypercapnia

American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1982
The effects on cerebral blood flow of alpha- or beta-adrenergic receptor stimulation of cerebral vessels were examined in 13 unanesthetized goats before and during hypercapnia produced by inhalation of 10% CO2 in air. This procedure increased the PCO2 from 34 to 52 and was accompanied by a fall in pH from 7.39 to 7.26.
A L, López de Pablo, M C, González, G, Dieguez, B, Gómez, S, Lluch   +4 more
openaire   +2 more sources

Cerebrovascular Reactivity to Carbon Dioxide in Alzheimer's Disease [PDF]

Journal of Alzheimer's Disease, 2013
There is growing evidence that cerebrovascular reactivity to carbon dioxide (CVRCO2) is impaired in Alzheimer's disease (AD). Preclinical and animal studies suggest chronic hypercontractility in brain vessels in AD. We review (a) preclinical studies of mechanisms for impaired CVRCO2 in AD; (b) clinical studies of cerebrovascular function in subjects ...
Lidia, Glodzik, Catherine, Randall, Henry, Rusinek, Mony J, de Leon   +3 more
openaire   +2 more sources

Cerebrovascular reactivity and dynamic autoregulation in tetraplegia

American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 2010
Humans with spinal cord injury have impaired cardiovascular function proportional to the level and completeness of the lesion. The effect on cerebrovascular function is unclear, especially for high-level lesions. The purpose of this study was to evaluate the integrity of dynamic cerebral autoregulation (CA) and the cerebrovascular reactivity in ...
Luke C, Wilson, James D, Cotter, Jui-Lin, Fan, Rebekah A I, Lucas, Kate N, Thomas, Philip N, Ainslie   +5 more
openaire   +2 more sources

Critical Thresholds for Cerebrovascular Reactivity: Fact or Fiction?

Neurocritical Care, 2012
To the Editor, We read with interest the recent publication by Sorrentino et al. [1] entitled: ‘‘Critical Thresholds for Cerebrovascular Reactivity after Traumatic Brain Injury’’. The study is based on the hypothesis that bedside real-time calculation of the pressure-reactivity index (PRx) allows a continuous estimation of cerebral pressure ...
Nordström, Carl-Henrik, Nielsen, Troels Halfeld   +1 more
openaire   +2 more sources

Cerebrovascular reactivity impairment in resistant hypertension

Journal of Human Hypertension
Resistant hypertension (RH) is defined as office systolic blood pressure (BP) that remains uncontrolled despite the concurrent use of three or more antihypertensive drug classes and may be associated with altered vasomotor responses to physiological stimuli.
Miceli, G, Velardo, M, Casuccio, A, Daidone, M, Basso, M G, Tuttolomondo, A   +5 more
openaire   +2 more sources