Results 21 to 30 of about 711,742 (203)

Cerebral blood flow remains reduced after tilt testing in myalgic encephalomyelitis/chronic fatigue syndrome patients

Clinical Neurophysiology Practice, 2021
Objective: Orthostatic symptoms in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) may be caused by an abnormal reduction in cerebral blood flow.
C. (Linda) M.C. van Campen, Peter C. Rowe, Frans C. Visser   +2 more
doaj   +1 more source

Validation of a new spectrometer for noninvasive measurement of cardiac output [PDF]

, 2004
Acetylene is a blood-soluble gas and for many years its uptake rate during rebreathing tests has been used to calculate the flow rate of blood through the lungs (normally equal to cardiac output) as well as the volume of lung tissue.
Baum, Marc M., Kumar, Sasi, Moss, John A., Wagner, Peter D.   +3 more
core   +1 more source

The predictive value of deep learning-based cardiac ultrasound flow imaging for hypertrophic cardiomyopathy complicating arrhythmias

European Journal of Medical Research, 2023
Objective To investigate the predictive value of deep learning-based cardiac ultrasound flow imaging for hypertrophic cardiomyopathy (HCM) complicated by arrhythmias.
Haotang Wu, Zhiyong Huang, Juanjuan Liu, Jiancheng Dai, Yong Zhao, Weiquan Luo   +5 more
doaj   +1 more source

Intraaortic Balloon Pump Counterpulsation and Cerebral Autoregulation: an observational study

BMC Anesthesiology, 2010
Background The use of Intra-aortic counterpulsation is a well established supportive therapy for patients in cardiac failure or after cardiac surgery.
Boots Rob, Barnett Adrian G, Timms Daniel, Dunster Kimble, Geng Shureng, Bellapart Judith, Fraser John F   +6 more
doaj   +1 more source

Local temperature-sensitive mechanisms are important mediators of limb tissue hyperemia in the heat-stressed human at rest and during small muscle mass exercise. [PDF]

, 2015
Limb tissue and systemic blood flow increases with heat stress, but the underlying mechanisms remain poorly understood. Here, we tested the hypothesis that heat stress-induced increases in limb tissue perfusion are primarily mediated by local temperature-
Ali, L, Banker, DS, Chiesa, ST, González-Alonso, J, Kalsi, KK, Lotlikar, MD, Rakobowchuk, M, Trangmar, SJ   +7 more
core   +1 more source

4-Dimensional Flow by Cardiac Magnetic Resonance Informs Surgical Planning in Partial Anomalous Pulmonary Venous Return

JACC: Case Reports, 2020
Four-dimensional flow cardiac magnetic resonance enhances the visualization of blood flow in a 3-dimensional volume throughout the cardiac cycle, thus dramatically improving visualization of pulmonary venous anatomy by cardiac magnetic resonance.
Adam Christopher, MD, Laura Olivieri, MD, Russell Cross, MD, Karthik Ramakrishnan, MD, Yue-Hin Loke, MD   +4 more
doaj   +1 more source

Effect of Cardiac Contraction on Coronary Blood Flow [PDF]

Circulation, 1957
In the experimental animal the basic and controversial problem was studied of the influence of cardiac contraction on coronary blood flow. Normally beating hearts were perfused at a constant pressure, and coronary inflow and outflow were determined. In order to assess the role of systole, prolonged periods of ventricular asystole and fibrillation were ...
D E, GREGG, D C, SABISTON
openaire   +2 more sources

Cerebral autoregulation, brain injury, and the transitioning premature infant [PDF]

, 2017
Improvements in clinical management of the preterm infant have reduced the rates of the two most common forms of brain injury, such as severe intraventricular hemorrhage and white matter injury, both of which are contributory factors in the development ...
Mathur, Amit M, Vesoulis, Zachary A
core   +3 more sources

Associations between changes in precerebral blood flow and cerebral oximetry in the lower body negative pressure model of hypovolemia in healthy volunteers.

PLoS ONE, 2019
Reductions in cerebral oxygen saturation (ScO2) measured by near infra-red spectroscopy have been found during compensated hypovolemia in the lower body negative pressure (LBNP)-model, which may reflect reduced cerebral blood flow. However, ScO2 may also
Jonny Hisdal, Svein Aslak Landsverk, Ingrid Elise Hoff, Ove Andreas Hagen, Knut Arvid Kirkebøen, Lars Øivind Høiseth   +5 more
doaj   +1 more source

Weaning from venous-arterial extracorporeal membrane oxygenation: The hemodynamic and clinical aspects of flow challenge test

Frontiers in Medicine, 2022
The cardiac function reserve is crucial for the successful weaning of V-A ECMO. During the V-A ECMO weaning phase, the gradual reduction in pump flow converts the blood flow originally driven by the pump to native cardiac output and also transforms ...
Jing-chao Luo, Yi-jie Zhang, Jun-yi Hou, Ming-hao Luo, Ming-hao Luo, Kai Liu, Guo-wei Tu, Zhe Luo, Zhe Luo, Zhe Luo   +9 more
doaj   +1 more source