Results 191 to 200 of about 3,313,018 (220)
Some of the next articles are maybe not open access.
Nonstationarity of dynamic cerebral autoregulation
Medical Engineering & Physics, 2013Dynamic cerebral autoregulation (dCA), the transient response of cerebral blood flow (CBF) to rapid changes in arterial blood pressure (BP), is usually quantified by parameters extracted from time- or frequency-domain analysis. Reproducibility studies of dCA parameters and consideration of the physiological determinants of the dynamic BP-CBF ...
openaire +2 more sources
Dynamic Cerebral Autoregulation at High Altitude
1999Cerebral autoregulation is a dynamic process that is frequency dependent. In other words, the ability of local vascular control mechanisms to buffer changes in arterial pressure and keep cerebral blood flow (CBF) constant may be more or less effective depending on the time period, or frequency at which changes in blood pressure occur.
B D, Levine, R, Zhang, R C, Roach
openaire +2 more sources
Cerebral autoregulation dynamics in endurance-trained individuals
Journal of Applied Physiology, 2011Aerobic fitness may be associated with reduced orthostatic tolerance. To investigate whether trained individuals have less effective regulation of cerebral vascular resistance, we studied the middle cerebral artery (MCA) mean blood velocity ( Vmean) response to a sudden drop in mean arterial pressure (MAP) after 2.5 min of leg ischemia in endurance ...
Lind-Holst, Mikkel +6 more
openaire +4 more sources
Dynamic Cerebral Autoregulation after Cardiopulmonary Bypass
The Thoracic and Cardiovascular Surgeon, 2015Background Cerebral hemodynamic disturbances in the peri- or postoperative period may contribute to postoperative cognitive dysfunction (POCD) in patients undergoing coronary artery bypass grafting (CABG) with cardiopulmonary bypass (CPB). We therefore examined dynamic cerebral autoregulation (dCA) post-CPB and changes in neurocognitive function in ...
Christiansen, Claus Behrend +6 more
openaire +3 more sources
An Investigation of Dynamic Cerebral Autoregulation in Adolescent Concussion
Medicine & Science in Sports & Exercise, 2018ABSTRACTPurposeAlthough cerebrovascular impairments are believed to contribute to concussion symptoms, little information exists regarding brain vasomotor control in adolescent concussion, particularly autoregulatory control that forms a fundamental response mechanism during changes in blood pressure. This research tested the hypothesis that adolescent
Moir, M Erin +6 more
openaire +3 more sources
Impaired dynamic cerebral autoregulation in middle cerebral artery stenosis
Neurological Research, 2006Analysis of dynamic cerebral autoregulation during transient falls in blood pressure is considered a sensitive and convenient method for evaluating patients with carotid artery stenosis. To this point, there have been few reports on the efficacy of using the thigh cuffs technique to analyse middle cerebral artery (MCA) stenosis.
Xi-ping, Gong +3 more
openaire +2 more sources
Central Hypervolemia with Hemodilution Impairs Dynamic Cerebral Autoregulation
Anesthesia & Analgesia, 2007Frequent changes in the perioperative central blood volume could affect cerebral autoregulation through alterations in sympathetic nerve activity, cardiac output, blood viscosity, and cerebral vasomotor tone. However, the effect of dynamic cerebral autoregulation has not been studied during acute wide-ranging changes in central blood volume, especially
Yojiro, Ogawa +5 more
openaire +2 more sources
Impaired Dynamic Cerebral Autoregulation in Carotid Artery Stenosis
Stroke, 1997Background and Purpose If it could be determined whether cerebral blood flow can be maintained (autoregulated) during transient falls in arterial blood pressure, we might be able to identify patients with carotid stenosis who are at risk of stroke. However, conventional methods of determining autoregulation in such patients are
R P, White, H S, Markus
openaire +2 more sources
Acute effect of coffee drinking on dynamic cerebral autoregulation
European Journal of Applied Physiology, 2016Drinking coffee causes caffeine-induced physiological alterations such as increases in arterial blood pressure, sympathetic nerve activity, cerebral vasoconstriction, etc., and these physiological alterations may be associated with a reduced risk of cerebral vascular disease.
Hiroyuki, Sasaki +3 more
openaire +2 more sources
Dynamics of cerebral blood flow autoregulation in hypertensive patients
Journal of the Neurological Sciences, 2002In hypertensive patients, the upper and lower limits of cerebral autoregulation are shifted to higher levels. However, the dynamics of cerebral autoregulation in hypertensive patients are less well known. We compared the dynamics of cerebral autoregulation in 21 treated hypertensive patients (13 men and 8 women; mean age: 48.9+/-13.6 years) and in 21 ...
Anne Pavy-Le, Traon +4 more
openaire +2 more sources