Results 261 to 270 of about 51,296 (302)

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

Cerebrovascular Reactivity in Migraine With and Without Aura

Headache: The Journal of Head and Face Pain, 1996
Abnormal cerebrovascular regulation has been implicated in the pathogenesis of migraine. Our aim in this study was to evaluate cerebrovascular reactivity to different stimulations in migraine with and without aura. Using bilateral transcranial Doppler, the changes of flow velocity during hypercapnia and mental and motor activity were measured in the ...
M, Silvestrini, M, Matteis, E, Troisi, L M, Cupini, G, Bernardi   +4 more
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

Cerebrovascular Reactivity in Atrial Fibrillation

The FASEB Journal, 2017
Atrial fibrillation is associated with substantial risk of severe stroke, cognitive decline and dementia. Elevated plasma biomarkers of vascular damage/dysfunction and reduced conduit (brachial) artery function have been reported in atrial fibrillation.
James P Fisher, Igor Dutra Braz, Samuel J E Lucas, Louisa Edwards, Johannes J van Lieshout, Gregory Y H Lip   +5 more
openaire   +1 more source

Effects of Bypas's on CO 2 Cerebrovascular Reactivity in Ischaemic Cerebrovascular Diseases - Based on the Intra-Operative LCBF and CO 2 Cerebrovascular Reactivity Studies

Acta Neurochirurgica, 1999
The authors evaluated the effects of superficial temporal to middle cerebral artery (STA-MCA) bypass on CO2 cerebrovascular reactivity (CVR) in ischaemic cerebrovascular diseases (CVDs). Local cerebral blood flow (LCBF) and CO2 CVR in 19 patients with ischaemic CVD subjected to standard STA-MCA bypasses were examined during surgery.
S, Kawaguchi, T, Sakaki, R, Uranishi
openaire   +2 more sources