Results 11 to 20 of about 51,296 (302)

Cerebrovascular Resistance: The Basis of Cerebrovascular Reactivity [PDF]

Frontiers in Neuroscience, 2018
The cerebral vascular network regulates blood flow distribution by adjusting vessel diameters, and consequently resistance to flow, in response to metabolic demands (neurovascular coupling) and changes in perfusion pressure (autoregulation).
James Duffin, James Duffin, Olivia Sobczyk, Larissa McKetton, Adrian Crawley, Julien Poublanc, Lashmi Venkatraghavan, Kevin Sam, W. Alan Mutch, David Mikulis, David Mikulis, David Mikulis, Joseph A. Fisher, Joseph A. Fisher, Joseph A. Fisher   +14 more
doaj   +3 more sources

Impaired Cerebrovascular Reactivity in Huntington’s Disease [PDF]

Frontiers in Physiology, 2021
There is increasing evidence that impairments of cerebrovascular function and/or abnormalities of the cerebral vasculature might contribute to early neuronal cell loss in Huntington’s disease (HD).
Suk Tak Chan, Nathaniel D. Mercaldo, Kenneth K. Kwong, Steven M. Hersch, Herminia D. Rosas, Herminia D. Rosas   +5 more
doaj   +3 more sources

Measuring Cerebrovascular Reactivity: Sixteen Avoidable Pitfalls [PDF]

Frontiers in Physiology, 2021
An increase in arterial PCO2 is the most common stressor used to increase cerebral blood flow for assessing cerebral vascular reactivity (CVR). That CO2 is readily obtained, inexpensive, easy to administer, and safe to inhale belies the difficulties in ...
Olivia Sobczyk, Olivia Sobczyk, Jorn Fierstra, Lakshmikumar Venkatraghavan, Julien Poublanc, James Duffin, James Duffin, Joseph A. Fisher, Joseph A. Fisher, Joseph A. Fisher, David J. Mikulis, David J. Mikulis   +11 more
doaj   +4 more sources

Cerebrovascular Pressure Reactivity in Children with TBI

Pediatric Neurology Briefs, 2015
Investigators from University of Melbourne, Australia, studied Pressure-Reactivity Index (PRx) and optimal Cerebral Perfusion Pressure (CPP) in 36 children aged between 6 months and 16 years treated for traumatic brain injury (TBI) at the Royal Children ...
Laurence Ducharme-Crevier
doaj   +5 more sources

Abnormal Cerebrovascular Reactivity in Patients with Parkinson’s Disease [PDF]

Parkinson's Disease, 2015
Background. Orthostatic hypotension (OH) is an important nonmotor manifestation of Parkinson’s disease (PD). Changes in cerebrovascular reactivity may contribute to this manifestation and can be monitored using transcranial Doppler. Objective.
Carlos Henrique Ferreira Camargo, Eduardo Antunes Martins, Marcos Christiano Lange, Henrique Alvaro Hoffmann, Jissa Jeanete Luciano, Marcelo Rezende Young Blood, Marcelo Derbli Schafranski, Marcelo Machado Ferro, Edmar Miyoshi   +8 more
doaj   +3 more sources

Abnormal Cerebrovascular Reactivity in Parkinson’s Disease [PDF]

Parkinson's Disease, 2015
We read with great interest the recent original article by Camargo et al. [1] titled “Abnormal Cerebrovascular Reactivity in Patients with Parkinson's Disease.” Authors observed that patients with Parkinson's disease (PD) have impaired cerebrovascular reactivity (CVR) as compared to those without orthostatic hypotension (OH) and to the control subjects.
Kiran Prakash
doaj   +3 more sources

Cerebrovascular Reactivity and Subcortical Infarctions [PDF]

Archives of Neurology, 2001
To investigate the association between different kinds of ischemic lesions and cerebrovascular reactivity (CR) and to evaluate their relationships with the major risk factors for stroke.We evaluated CR using the breath-holding index technique during bilateral transcranial Doppler monitoring of flow velocity in the middle cerebral arteries of 41 ...
Cupini, L, DIOMEDI, MARINA, PLACIDI, FABIO, SILVESTRINI, MAURO, GIACOMINI, PIERGIORGIO   +4 more
openaire   +5 more sources

Effect of Smoking on Cerebrovascular Reactivity [PDF]

Journal of Cerebral Blood Flow & Metabolism, 1996
Current smoking is a risk factor for stroke. The aim of this study was to evaluate the effect of smoking one cigarette on cerebral hemodynamics. Using transcranial Doppler ultrasound, we studied the changes of flow velocity after hypercapnia in the middle cerebral arteries (MCAs) of 24 healthy young smokers and 24 healthy controls matched for age and ...
M, Silvestrini, E, Troisi, M, Matteis, L M, Cupini, G, Bernardi   +4 more
openaire   +2 more sources

Measuring cerebrovascular reactivity in a hemodialysis cohort. [PDF]

Cereb Circ Cogn Behav
Introduction Cerebrovascular reactivity (CVR) can inform about cerebral vascular health and provide prognostic information on risk cerebral ischemic injury. Use of transcranial Doppler ultrasound (TCD) is a non-invasive and inexpensive method to measure CVR and often uses a stimulus of increase in arterial partial pressure of carbon dioxide (pCO2).
Seigworth C, Grassl I, Wolfgram DF.
europepmc   +3 more sources

NIRS-based cerebrovascular regulation assessment: exercise and cerebrovascular reactivity [PDF]

Neurophotonics, 2017
Alterations to cerebral blood flow (CBF) have been implicated in diverse neurological conditions. Near-infrared spectroscopy (NIRS)-measured regional cerebral tissue oxygen saturation ([Formula: see text]) provides an estimate of oxygenation of interrogated cerebral volume useful in identifying variations in oxygen supply to cerebral tissue and in ...
Stephanie, Miller, Kunal, Mitra
openaire   +2 more sources