Results 61 to 70 of about 16,999 (208)

Reproducibility of Transcranial Doppler ultrasound in the middle cerebral artery

Cardiovascular Ultrasound, 2018
Background Transcranial Doppler ultrasound remains the only imaging modality that is capable of real-time measurements of blood flow velocity and microembolic signals in the cerebral circulation.
Jakub Kaczynski, Rachel Home, Karen Shields, Matthew Walters, William Whiteley, Joanna Wardlaw, David E. Newby   +6 more
doaj   +1 more source

Linking dynamic cerebral autoregulation and inhibitory executive function: Role of modifiable behaviours

Experimental Physiology, EarlyView.
Abstract Dynamic cerebral autoregulation (dCA) stabilises cerebral blood flow (CBF) against rapid fluctuations in perfusion pressure and may serve as a key physiological mediator of cognitive function. Inhibitory executive function, a core domain essential for goal‐directed behaviour, is influenced by modifiable lifestyle factors such as physical ...
Hayato Tsukamoto, Damian M. Bailey
wiley   +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

Cerebral haemodynamic responses to inspiratory muscle work

Experimental Physiology, EarlyView.
Abstract Fatiguing inspiratory work has been shown to evoke a sympathetically mediated reflex that has systemic cardiovascular consequences, including increases in heart rate and blood pressure and a decrease in resting limb vascular conductance. Moreover, the response to this reflex appears to be attenuated in females compared with males.
Andrew H. Ramsook, Morgan A. Hughes, Wyatt W. Pruter, Kevin L. Webb, Ali Ataie, Chad C. Wiggins, Gabrielle A. Dillon, Sarah E. Baker, Michael J. Joyner   +8 more
wiley   +1 more source

Analyzing post‐endovascular treatment stroke prognosis with transcranial Doppler and quantitative electroencephalography

Annals of Clinical and Translational Neurology
Objective Despite successful recanalization following acute ischemic stroke, patients may have a poor prognosis. We investigated whether transcranial Doppler combined with quantitative electroencephalography can identify patients with a poor prognosis at
Yajie Qi, Yingqi Xing, Qingduo Wang, Yanting Cao, Hongxiu Chen, Ying Chen   +5 more
doaj   +1 more source

No difference in mean middle cerebral artery blood velocity responses between lower‐ and upper‐body unilateral resistance exercise in untrained individuals

Experimental Physiology, EarlyView.
Abstract Dynamic resistance exercise (RE) produces sinusoidal fluctuations in blood pressure that are mirrored by middle cerebral artery blood velocity (MCAv). However, whether lower‐ or upper‐body RE elicits a differential cerebrovascular response has not yet been examined.
Stephanie Korad, Toby Mündel, Blake G. Perry   +2 more
wiley   +1 more source

Konsep Dasar Transcranial Doppler (TCD) untuk Neurocritical Care

Jurnal Neuroanestesi Indonesia, 2017
Transcranial Doppler merupakan salah satu aplikasi dari penggunaan ultrasonografi (USG) sehingga bersifat noninvasif dan mobile. Untuk dapat menggunakan TCD dengan baik maka diperlukan pemahaman mengenai doppler effect yang merupakan dasar perhitungan ...
Ida Bagus Krisna J. Sutawan, Siti Chasnak Saleh, Tatang Bisri   +2 more
doaj   +1 more source

Sex differences in cerebral blood flow and cardiac function in response to exercise in the heat

Experimental Physiology, EarlyView.
Abstract We investigated the effect of exercising in hot conditions on cerebral blood flow and systolic left ventricular (LV) function in males and females, to explore sex differences. The experimental condition consisted of walking on a treadmill at 5 km/h and 2% incline, inside a heat chamber at 40°C (50% relative humidity), for 90 min.
João Carlos Locatelli, Juliene G. Costa, Kristanti W. Wigati, Jesse L. Criddle, Julie J. Collis, Xingwei Xu, Louise H. Naylor, Howard H. Carter, Shane K. Maloney, Robert A. McLaughlin, Andrew Haynes, Helen Jones, Keith George, Daniel J. Green   +13 more
wiley   +1 more source

Cerebrovascular flow‐mediated dilation in humans: Methodological challenges, physiological interpretation and future integrations

Experimental Physiology, EarlyView.
Abstract Arterial shear‐mediated vasodilation is a well‐established measure of endothelial function and serves as a critical biomarker for cardiovascular disease risk. Endothelial function can be measured using a variety of experimental methodologies; however, the most widely adopted technique is ultrasound‐based flow‐mediated dilation (FMD), in which ...
Yi Zhen Bao, Tabitha V. Craig, Jenna C. McCrone, Kurt J. Smith, Michael M. Tymko   +4 more
wiley   +1 more source

Factors influencing heart rate variability in nurses following night shifts: a prospective observational clinical study

BMC Nursing
Background Heart rate variability (HRV) has been established as a key indicator of autonomic nervous system activity, reflecting both sympathetic and parasympathetic modulation.
Taihe Zhan, Ziying Zhang, Zhimin Shi, Hongyan Xie, Daogang Zha, Xiumei Wei   +5 more
doaj   +1 more source