Results 61 to 70 of about 9,901 (229)

Uncovering the impact of the cardiovascular system on cerebrovascular health using MRI

Experimental Physiology, EarlyView.
Abstract Human cerebrovasculature is finely tuned to enable local changes in blood flow to meet the brain's demands, whilst protecting the brain from systemic changes in blood pressure, both acutely during a heartbeat and chronically over time. This review summarises cerebrovascular structure and function, their role in disease and neurodegeneration ...
Ian D. Driver, Kevin Murphy
wiley   +1 more source

Stimulated Acoustic Emission Detected by Transcranial Color Doppler Ultrasound

, 2000
Background and Purpose —Experimental and clinical data suggest that insonation of echo-contrast agents with high acoustical power produces disintegration of microbubbles, resulting in a pseudo-Doppler phenomenon called stimulated
Thomas Schlosser, Christoph Pohl, Klaus Tiemann, Harald Becher   +3 more
core   +1 more source

Accuracy of Power Mode Transcranial Doppler in the Diagnosis of Brain Death

Journal of Medical Ultrasound, 2015
The diagnosis of brain death (BD) is complex. For this reason, we aimed to evaluate the accuracy of power mode transcranial Doppler (PMD-TCD) in diagnosing BD.
Alejandro M. Brunser, Pablo M. Lavados, Daniel A. Cárcamo, Arnold Hoppe, Verónica V. Olavarría, Javiera López, Paula Muñoz, Rodrigo Rivas   +7 more
doaj   +1 more source

Individuals with persisting post‐concussion symptoms with physiological subtype demonstrate altered cardiovascular and autonomic responses to face cooling

Experimental Physiology, EarlyView.
Abstract Individuals with persisting post‐concussion symptoms with physiological subtype (PPCS‐P) demonstrate exercise intolerance due to exacerbation of concussion‐like symptoms during incremental exercise. We tested the hypothesis that individuals with PPCS‐P (n = 12) would have a blunted cardiac autonomic response to face cooling compared to healthy
Phillip J. Wallace, Steve Lidstone, Josh G. Nowlan, Johnathan Ljubanovich, Brandon J. McKinlay, Stephen A. Klassen, Stephen S. Cheung   +6 more
wiley   +1 more source

Power Transcranial Doppler Ultrasound in the Detection of Intracranial Aneurysms [PDF]

Stroke, 2001
Background and Purpose —We sought to perform a large, prospective, multicenter, blinded study comparing power transcranial color duplex sonography (power TCDS) with intra-arterial digital subtraction angiography (IADSA) in the detection of intracranial aneurysms.
P M, White, J M, Wardlaw, E, Teasdale, S, Sloss, J, Cannon, V, Easton   +5 more
openaire   +2 more sources

Transcranial Doppler Ultrasound as a Guide to Graded Therapeutic Occlusion of the Carotid Artery

, 1990
Although gradual carotid artery occlusion is an accepted and effective treatment for some surgically inaccessible intracranial aneurysms, there are no specific guidelines to determine the optimal amount of carotid artery narrowing at each adjustment. The
Cole A. Giller, Phillip Steig, Phillip Purdy, Duke Samson, Hunt H. Batjer   +4 more
core   +1 more source

Optimizing cerebrovascular endothelial health through shear stress modulation

Experimental Physiology, EarlyView.
Abstract The endothelium plays a pivotal role in regulating cerebrovascular blood flow, and its dysfunction increases the risk of cerebrovascular disease. Endothelial shear stress, a primary mechanical stimulus for endothelial nitric oxide production, is a key modulator of vascular adaptation.
Erika Iwamoto, Rintaro Sakamoto, Darren P. Casey   +2 more
wiley   +1 more source

Predictive value of transcranial doppler ultrasound for cerebral small vessel disease in elderly patients

, 2019
Objective: To investigate the predictive value of transcranial Doppler (TCD) ultrasound for cerebral small vessel disease in elderly patients. Methods: Transcranial Doppler ultrasound and magnetic resonance imaging (MRI) were performed on 184 elderly ...
Jiewen Zhang (5461778), Shengqi Fu (6826037), Shuling Zhang (129924), Hongtao Zhang (167639)   +3 more
core   +1 more source

The impact of red blood cell transfusion in preterm neonates on germinal matrix hemorrhage: incidence and grade with correlation to outcome

Egyptian Pediatric Association Gazette, 2023
Background Germinal matrix hemorrhage affects 20 to 25% of infants with a low birth weight (less than 1500 g). About one-tenth of them progress to intra-parenchymal hemorrhage, usually during the first days after birth.
Khaled Amin Nasef Ahmed, Dalia Ahmed Saied, Eman E. L. Sayed Mustafa Megahed, Sara Mahmoud Kamel, Mona Ahmed Kamel   +4 more
doaj   +1 more source

Time‐course analysis of cerebral circulation and cardiorespiratory responses to acute central blood volume reduction in healthy young males

Experimental Physiology, EarlyView.
Abstract Central blood volume (CBV) reduction challenges circulatory and respiratory homeostasis, particularly during the initial compensatory phase (0–2 min), when rapid physiological adaptations occur. In this study, we examined dynamic cardiorespiratory responses to CBV reduction using lower‐body negative pressure (LBNP) in 11 healthy young males ...
Marina Feeley, Tomoki Watada, Go Ito, Ai Shimada, Toru Sawai, Hideomi Nakata, Shingo Otsuki, Tadayoshi Miyamoto   +7 more
wiley   +1 more source