Results 11 to 20 of about 315,937 (349)

Daily rhythm of cerebral blood flow velocity

Journal 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, Conroy Deirdre A, Scott Rebecca Q   +2 more
doaj   +6 more sources

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

J 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, Schultz MG, Hughes AD, Picone DS, Black JA, Dwyer N, Roberts-Thomson P, Sharman JE.   +7 more
europepmc   +6 more sources

Novel physiological analysis using blood flow velocity for colonic polyps: Pilot study [PDF]

Endoscopy International Open
Real-time visualization of red blood cell flow inside subepithelial microvessels is performed with magnifying endoscopy. However, microvascular blood flow velocity in the colorectum has not been investigated.
Eiji Kamba, Takashi Murakami, Naoki Tsugawa, Kei Nomura, Keiichi Haga, Yoichi Akazawa, Hirofumi Fukushima, Hiroya Ueyama, Kenshi Matsumoto, Tomoyoshi Shibuya, Takeshi Terai, Takashi Yao, Akihito Nagahara   +12 more
doaj   +2 more sources

Atherosclerosis and blood flow velocity

The Journal of Thoracic and Cardiovascular Surgery, 1989
Megumi Mathison
openalex   +3 more sources

STUDIES ON THE VELOCITY OF BLOOD FLOW [PDF]

Journal of Clinical Investigation, 1930
Herrman L. Blumgart, Samuel L. Gargill, D. Rourke Gilligan   +2 more
  +12 more sources

Measurements of Blood Flow Velocity in the Microcirculation [PDF]

Upsala 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, B. Westergren, M. Intaglietta, K.-E. Arfors   +3 more
openaire   +3 more sources

Transcutaneous measurement of blood velocity profiles and flow [PDF]

Cardiovascular 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, Miller, Charles W, McLeod, Francis D   +2 more
openaire   +4 more sources

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

, 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, Arkaitz Larman, Friedman, Fry, Frydrychowicz, Ghalichi, Ku, Ku, Lee, Manosh C. Paul, Patankar, Paul, Sarifuddin, Stonebridge, Stonebridge, Stonebridge, Wilcox   +16 more
core   +1 more source

Fractal Rigidity in Migraine [PDF]

, 2003
We study the middle cerebral artery blood flow velocity (MCAfv) in humans using transcranial Doppler ultrasonography (TCD). Scaling properties of time series of the axial flow velocity averaged over a cardiac beat interval may be characterized by two ...
Glaubic-Latka, Marta, Latka, Dariusz, Latka, Miroslaw, West, Bruce J.   +3 more
core   +2 more sources

Large-Eddy simulation of pulsatile blood flow [PDF]

, 2009
Large-Eddy simulation (LES) is performed to study pulsatile blood flow through a 3D model of arterial stenosis. The model is chosen as a simple channel with a biological type stenosis formed on the top wall.
Despande, Fry, Frydrychowicz, Fung, Ghalichi, Giles Roditi, Jones, Lee, Liang, Lieber, Malek, Manosh C. Paul, Md. Mamun Molla, Mittal, Mittal, Pedley, Pedley, Piomelli, Scotti, Smagorinsky, Stonebridge, Sutera, Younis   +22 more
core   +1 more source