Results 21 to 30 of about 445,834 (292)

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

Transcranial Doppler Based Cerebrovascular Reactivity Indices in Adult Traumatic Brain Injury: A Scoping Review of Associations With Patient Oriented Outcomes

Frontiers in Pharmacology, 2021
Background: Disruption in cerebrovascular reactivity following traumatic brain injury (TBI) is a known phenomenon that may hold prognostic value and clinical relevance.
Alwyn Gomez, Alwyn Gomez, Logan Froese, Amanjyot Singh Sainbhi, Carleen Batson, Frederick A. Zeiler, Frederick A. Zeiler, Frederick A. Zeiler, Frederick A. Zeiler, Frederick A. Zeiler   +9 more
doaj   +1 more source

Neuroimaging assessment of cerebrovascular reactivity in concussion: current concepts, methodological considerations and review of the literature

Frontiers in Neurology, 2016
Concussion is a form of traumatic brain injury (TBI) that presents with a wide spectrum of subjective symptoms and few objective clinical findings. Emerging research suggests that one of the processes that may contribute to concussion pathophysiology is ...
Michael John Ellis, Michael John Ellis, Lawrence eRyner, Lawrence eRyner, Olivia eSobczyk, Olivia eSobczyk, Jorn eFierstra, David eMikulis, David eMikulis, Joseph Arnold Fisher, Joseph Arnold Fisher, James eDuffin, James eDuffin, W. Alan C. Mutch, W. Alan C. Mutch   +14 more
doaj   +1 more source

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

Impaired endothelium-mediated cerebrovascular reactivity promotes anxiety and respiration disorders in mice [PDF]

, 2020
Carbon dioxide (CO(2)), the major product of metabolism, has a strong impact on cerebral blood vessels, a phenomenon known as cerebrovascular reactivity.
Walther, T., Huber, G., Richter, M., Wagner, C.A., Natsagdorj, R., Ludewig, P., Stölting, I., Vogt, M., Saar, K., Feller, N., Lembrich, B., Assmann, J., Mueller-Fielitz, H., Schwaninger, M., Offermanns, S., Huebner, N., de Wit, C., Schmidt, K., Hübner, N., Fiehler, J., Raasch, W., Wagner, C., Koenig, G., Hansen, C.E., König, G.M., Wegmann, M., Brands, J., Assmann, J.C., Sedlacik, J., Müller-Fielitz, H., Wenzel, J., Vogt, M.A., Bettoni, C., Hansen, C., Kostenis, E., Gass, P., Stoelting, I.   +36 more
core   +2 more sources

Rapid cerebrovascular reactivity mapping: Enabling vascular reactivity information to be routinely acquired [PDF]

, 2017
Cerebrovascular reactivity mapping (CVR), using magnetic resonance imaging (MRI) and carbon dioxide as a stimulus, provides useful information on how cerebral blood vessels react under stress.
Bulte, Daniel P., Blockley, NP, Daniel P. Bulte, Harkin, James W., Nicholas P. Blockley, Bulte, Daniel P, Blockley, Nicholas P., Blockley, Nicholas, James W. Harkin, Harkin, JW, Bulte, DP, Harkin, James W   +11 more
core   +1 more source

Temporal relationship between vasopressor and sedative administration and cerebrovascular response in traumatic brain injury: a time-series analysis

Intensive Care Medicine Experimental, 2023
Background Although vasopressor and sedative agents are commonly used within the intensive care unit to mediate systemic and cerebral physiology, the full impact such agents have on cerebrovascular reactivity remains unclear.
Logan Froese, Alwyn Gomez, Amanjyot Singh Sainbhi, Nuray Vakitbilir, Izabella Marquez, Fiorella Amenta, Kevin Y. Stein, Frederick A. Zeiler   +7 more
doaj   +1 more source

The impact of sedative and vasopressor agents on cerebrovascular reactivity in severe traumatic brain injury

Intensive Care Medicine Experimental, 2023
Background The aim of this study is to evaluate the impact of commonly administered sedatives (Propofol, Alfentanil, Fentanyl, and Midazolam) and vasopressor (Dobutamine, Ephedrine, Noradrenaline and Vasopressin) agents on cerebrovascular reactivity in ...
Logan Froese, Emma Hammarlund, Cecilia A. I. Åkerlund, Jonathan Tjerkaski, Erik Hong, Caroline Lindblad, David W. Nelson, Eric P. Thelin, Frederick A. Zeiler   +8 more
doaj   +1 more source

Breath holding for 20 s following extended expiration is a practical, effective and robust standard when measuring cerebrovascular reactivity in healthy adults using BOLD fMRI at 3 T

NeuroImage: Reports, 2021
Background and Purpose: BOLD fMRI is becoming the preferred modality to study cerebrovascular reactivity. Amongst the vasoactive stimuli to induce it, breath holding is considered equal to other methods but both cerebrovascular reserve measures and ...
Jörg Larsen, Kai Kallenberg, Johanna Rühlmann, Jürgen Baudewig, Eike A. Nickel, Michael Knauth, Peter Dechent   +6 more
doaj   +1 more source

Impaired Cerebrovascular Reactivity in Multiple Sclerosis [PDF]

JAMA Neurology, 2014
Cerebrovascular reactivity (CVR) is an inherent indicator of the dilatory capacity of cerebral arterioles for a vasomotor stimulus for maintaining a spontaneous and instant increase of cerebral blood flow (CBF) in response to neural activation. The integrity of this mechanism is essential to preserving healthy neurovascular coupling; however, to our ...
Olga, Marshall, Hanzhang, Lu, Jean-Christophe, Brisset, Feng, Xu, Peiying, Liu, Joseph, Herbert, Robert I, Grossman, Yulin, Ge   +7 more
openaire   +2 more sources