Results 11 to 20 of about 1,197,781 (393)

Daily rhythm of cerebral blood flow velocity

open access: yesJournal of Circadian Rhythms, 2005
Background CBFV (cerebral blood flow velocity) is lower in the morning than in the afternoon and evening. Two hypotheses have been proposed to explain the time of day changes in CBFV: 1) CBFV changes are due to sleep-associated processes or 2) time of ...
Spielman Arthur J   +2 more
doaj   +6 more sources

Atherosclerosis and blood flow velocity

open access: bronzeThe Journal of Thoracic and Cardiovascular Surgery, 1989
Megumi Mathison
openalex   +3 more sources

Excess pressure as an analogue of blood flow velocity. [PDF]

open access: yesJ Hypertens, 2021
Introduction: Derivation of blood flow velocity from a blood pressure waveform is a novel technique, which could have potential clinical importance. Excess pressure, calculated from the blood pressure waveform via the reservoir-excess pressure model, is purported to be an analogue of blood flow velocity but this has never been ...
Armstrong MK   +7 more
europepmc   +6 more sources

Measurements of Blood Flow Velocity in the Microcirculation [PDF]

open access: yesUpsala Journal of Medical Sciences, 1975
A method for the measurement of red blood cell velocity in the microcirculation is described. The technique is based on the on-line cross-correlation of the delay between optical signatures derived from photodetectors aligned in direction oflow. A specialised photodiode holder which can be inserted directly in place of an ocular is described.
D. Bergqvist   +3 more
openaire   +3 more sources

ISCHEMIA/REPERFUSION EFFECT ON PANCREATIC VOLUMETRICAL BLOOD FLOW VELOCITY [PDF]

open access: yesResearch Results in Pharmacology, 2015
We investigate blood flow velocity at ischemia/reperfusion early stages. Transient hyperemia absence after ischemia/reperfusion cased by pancreatic edema development at early stages confirmed by Wet/Dry ratio elevation and morphological changes was ...
Dmytry Kolmykov, Sergey Alehin
doaj   +3 more sources

Transcutaneous measurement of blood velocity profiles and flow [PDF]

open access: yesCardiovascular Research, 1973
A comprehensive report is presented of the application of a pulsed ultrasound Doppler velocity meter for transcutaneous measurement of time varying velocity, velocity profiles, and instantaneous flow in arteries of anaesthetized dogs. The procedure used to provide direct velocity and flow calibration using the Doppler equation is outlined.
Histand, Michael B   +2 more
openaire   +4 more sources

The effect of increased preset intraocular pressure level on choroidal blood flow during phacoemulsification

open access: yesРоссийский офтальмологический журнал, 2022
Purpose: to evaluate blood flow velocity in the posterior short ciliary arteries during phacoemulsification (PE) at different levels of intraocular pressure (IOP).Material and methods.
Yu. V. Takhtaev   +2 more
doaj   +1 more source

Impact of Active Recovery and Whole-Body Electromyostimulation on Blood-Flow and Blood Lactate Removal in Healthy People [PDF]

open access: yes, 2020
This study aimed to determine whether an active recovery with added whole-body electromyostimulation (WB-EMS) can increase blood flow and lead to blood lactate removal after intense exercise.
Babault   +28 more
core   +1 more source

Investigation of spiral blood flow in a model of arterial stenosis [PDF]

open access: yes, 2009
The spiral component of blood flow has both beneficial and detrimental effects in human circulatory system [Stonebridge PA, Brophy CM. Spiral laminar flow in arteries? Lancet 1991; 338: 1360–1].
Ahmed   +16 more
core   +1 more source

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