Results 91 to 100 of about 17,191 (249)

Carotid artery dissection linked to intermittent apnoeic swimming: A case–control study

Experimental Physiology, EarlyView.
Abstract Internal carotid artery (ICA) dissection is a rare and potentially devastating cause of cerebral ischaemia, initiated by an intimal tear or rupture of the vasa vasorum, that can lead to an intraluminal thrombus, vascular stenosis, occlusion, or dissecting aneurysm formation.
Damian M. Bailey, Richard G. Davies, Brenig L. Gwilym, Benjamin S. Stacey, Danny Walmsley, Michael H. Lewis, Josip Butkovic, Ivan Mumlek, Brad Perry, Zvonomir Vrselja, Shigehiko Ogoh, James A. Pawelczyk, Mohamad Bashir, Richard D. White, Ian M. Williams   +14 more
wiley   +1 more source

Real-time imaging of the medullary circuitry involved in the generation of spontaneous muscle sympathetic nerve activity in awake human subjects [PDF]

, 2008
In order to understand the central neural processes involved in blood pressure regulation we recorded muscle sympathetic nerve activity (MSNA) via a tungsten microelectrode in the common peroneal nerve while performing functional Magnetic Resonance ...
Luke Henderson, Vaughan Macefield
core   +1 more source

Exploring physiological factors underlying individual differences in exercise‐induced blood pressure responses

Experimental Physiology, EarlyView.
Abstract Even among healthy individuals, arterial blood pressure (ABP) responses to exercise vary widely. However, the mechanisms underlying this individual variability remain unclear. To investigate these mechanisms, 29 participants performed isometric handgrip exercise at 30% of their maximum voluntary contraction, followed by postexercise muscle ...
Shigehiko Ogoh, Ryosuke Takeda, Narumi Kunimatsu, Hayato Tsukamoto, Ai Shimada, Tomoki Watada, Marina Feeley, Taichi Nishikawa, Marino Karaki, Kohei Watanabe, Tadayoshi Miyamoto   +10 more
wiley   +1 more source

Detection of impaired cerebral autoregulation improves by increasing arterial blood pressure variability

, 2012
Although the assessment of dynamic cerebral autoregulation (CA) based on measurements of spontaneous fluctuations in arterial blood pressure (ABP) and cerebral blood flow (CBF) is a convenient and much used method, there remains uncertainty about its ...
Allen, Robert, Birch, Anthony A., Bush, Glen, Fan, Lingke, Katsogridakis, Emmanuel, Panerai, Ronney B., Potter, John F., Simpson, David M.   +7 more
core   +1 more source

Simultaneous noninvasive recording of skin sympathetic nerve activity and electrocardiogram [PDF]

, 2017
BACKGROUND: Sympathetic nerve activity is important to cardiac arrhythmogenesis. OBJECTIVE: The purpose of this study was to develop a method for simultaneous noninvasive recording of skin sympathetic nerve activity (SKNA) and electrocardiogram ...
Adams, David, Cha, Yong-Mei, Chen, Lan S., Chen, Peng-Sheng, Coffey, Arthur, Doytchinova, Anisiia, Everett, Thomas H., IV, Hassel, Jonathan L., Kincaid, John C., Kovacs, Richard J., Li, Yan, Lin, Hongbo, Lin, Shien-Fong, Meshberger, Chad, Salanova, Vicenta, Shen, Changyu, Smith, Kimberly, Straka, Susan, Victor, Ronald, Wagner, David, Wright, Keith, Wu, Gang, Yin, Dechun, Yuan, Yuan   +23 more
core   +1 more source

Cardiovascular, respiratory and splenic responses to rebreathing and apnoea during exercise

Experimental Physiology, EarlyView.
Abstract We investigated integrative physiological responses to eupnoeic exercise (EX), rebreathing exercise (RB), dynamic apnoea (DA) and dynamic apnoea with cold‐water face immersion (DAFI) in 20 healthy participants. Trials involved non‐steady‐state cycle exercise at 60 W for an average duration of 66 s.
Theodore Dotevall, Maja Persson, Bodil Sjögreen, Mats H. Linér, Angelica Lodin‐Sundström, Johan P. A. Andersson   +5 more
wiley   +1 more source

Autonomic modulation in patients with heart failure increases beat-to-beat variability of ventricular action potential duration [PDF]

, 2017
Background: Exaggerated beat-to-beat variability of ventricular action potential duration (APD) is linked to arrhythmogenesis. Sympathetic stimulation has been shown to increase QT interval variability, but its effect on ventricular APD in humans has not
Behar, Jonathan, Bishop, Martin J., Claridge, Simon, Gill, Jaswinder S., Gould, Justin, O'Neill, Mark, Porter, Bradley, Razavi, Reza, Rinaldi, Christopher A., Sieniewicz, Benjamin J., Taggart, Peter, Webb, Jessica   +11 more
core   +2 more sources

Valsalva maneuver and strain-related ECG changes

Research in Cardiovascular Medicine, 2015
During the four steps of the Valsalva maneuver (VM), opposite changes can be observed in some physiologic parameters. Manifestations of the VM in the electrocardiogram (ECG) have been studied in detail, but there have been few reports comparing VM-related biochemical and hemodynamic changes with a focus on the strain phase of the VM.We studied strain ...
Seyed Mehran Hosseini, Mohsen Jamshir
openaire   +3 more sources

Prediabetic cardiomyopathy is attenuated by hypothalamic PVN oxytocin neuron activation

The Journal of Physiology, EarlyView.
Abstract figure legend A long‐term high‐fat, high‐fructose diet induces prediabetes with insulin resistance, hyperinsulinaemia, elevated triglycerides and metabolic‐associated steatotic liver disease (MASLD) in male rats. Animals developed prediabetic cardiomyopathy characterized by diastolic dysfunction, interstitial fibrosis and tachycardia ...
Anna Nilsson, Joan Escobar, Kira Kuraoka, Ian Venter, Cielo A. Carnate, Matthew W. Kay, David Mendelowitz, Kathryn J. Schunke   +7 more
wiley   +1 more source

Effects of nocturnal periodic breathing on sympathetic nerve activity and ventilatory control at high altitude: a randomised, crossover study

The Journal of Physiology, EarlyView.
Abstract figure legend Schematic overview of the randomised crossover study investigating the effects of nocturnal periodic breathing (nPB) on sympathetic activity and ventilatory acclimatisation in hypobaric hypoxia equivalent to 4000 m altitude. Participants completed two 3‐day sojourns where nPB was inhibited by increasing inspiratory CO2 fraction ...
Johanna Roche, James P. Fisher, Peter Rasmussen, Abubaker Ibrahim, Philip N. Ainslie, Rachel Turner, Giovanni Vinetti, Matteo Cesari, Michael Furian, Ambra Stefani, Nikolaus Netzer, Hannes Gatterer, Birgit Högl, Christoph Siebenmann   +13 more
wiley   +1 more source