Search Results - "Willie, Chris K."

UBC‐Nepal expedition: phenotypical evidence for evolutionary adaptation in the control of cerebral blood flow and oxygen delivery at high altitude by Hoiland, Ryan L., Howe, Connor A., Carter, Howard H., Tremblay, Joshua C., Willie, Chris K., Donnelly, Joseph, MacLeod, David B., Gasho, Chris, Stembridge, Mike, Boulet, Lindsey M., Niroula, Shailesh, Ainslie, Philip N.

“…Key points Sherpa have lived in the Nepal Himalaya for 25–40 thousand years and display positive physiological adaptations to hypoxia. Sherpa have previously…”
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Cerebrovascular Regulation During Transient Hypotension and Hypertension in Humans by Tzeng, Yu-Chieh, Willie, Chris K, Atkinson, Greg, Lucas, Samuel J.E, Wong, Aaron, Ainslie, Philip N

“…The cerebrovasculature dilates or constricts in response to acute blood pressure changes to stabilize cerebral blood flow across a range of blood pressures. It…”
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Indomethacin‐induced impairment of regional cerebrovascular reactivity: implications for respiratory control by Hoiland, Ryan L., Ainslie, Philip N., Wildfong, Kevin W., Smith, Kurt J., Bain, Anthony R., Willie, Chris K., Foster, Glen, Monteleone, Brad, Day, Trevor A.

“…Key points Anterior and posterior cerebral circulations have differential reactivity to changes in arterial blood gases, but the implications for the…”
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Fundamental relationships between arterial baroreflex sensitivity and dynamic cerebral autoregulation in humans by TZENG, Yu-Chieh, LUCAS, Samuel J. E, ATKINSON, Greg, WILLIE, Chris K, AINSLIE, Philip N

“…The functional relationship between dynamic cerebral autoregulation (CA) and arterial baroreflex sensitivity (BRS) in humans is unknown. Given that adequate…”
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The effect of α1‐adrenergic blockade on post‐exercise brachial artery flow‐mediated dilatation at sea level and high altitude by Tymko, Michael M., Tremblay, Joshua C., Hansen, Alex B., Howe, Connor A., Willie, Chris K., Stembridge, Mike, Green, Daniel J., Hoiland, Ryan L., Subedi, Prajan, Anholm, James D., Ainslie, Philip N.

“…Key points Our objective was to quantify endothelial function (via brachial artery flow‐mediated dilatation) at sea level (344 m) and high altitude (3800 m) at…”
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Initial orthostatic hypotension is unrelated to orthostatic tolerance in healthy young subjects by Thomas, Kate N, Cotter, James D, Galvin, Sean D, Williams, Michael J. A, Willie, Chris K, Ainslie, Philip N

“…1 Department of Physiology, 2 School of Physical Education, and 3 Department of Medical and Surgical Sciences, University of Otago, Dunedin, New Zealand; and 4…”
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Chemoreceptor Responsiveness at Sea Level Does Not Predict the Pulmonary Pressure Response to High Altitude by Hoiland, Ryan L., BHK, Foster, Glen E., PhD, Donnelly, Joseph, MBChB, Stembridge, Mike, MSc, Willie, Chris K., PhD, Smith, Kurt J., MSc, Lewis, Nia C., PhD, Lucas, Samuel J.E., PhD, Cotter, Jim D., PhD, Yeoman, David J., BSc, Thomas, Kate N., BSc, Day, Trevor A., PhD, Tymko, Mike M., BHSc, Burgess, Keith R., MD, Ainslie, Philip N., PhD

“…BACKGROUND The hypoxic ventilatory response (HVR) at sea level (SL) is moderately predictive of the change in pulmonary artery systolic pressure (PASP) to…”
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Contribution of arterial Windkessel in low-frequency cerebral hemodynamics during transient changes in blood pressure by CHAN, Gregory S. H, AINSLIE, Philip N, WILLIE, Chris K, TAYLOR, Chloe E, ATKINSON, Greg, JONES, Helen, LOVELL, Nigel H, TZENG, Yu-Chieh

“…The Windkessel properties of the vasculature are known to play a significant role in buffering arterial pulsations, but their potential importance in dampening…”
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Interactions between heart rate variability and pulmonary gas exchange efficiency in humans by Sin, Peter Y. W., Webber, Matthew R., Galletly, Duncan C., Ainslie, Philip N., Brown, Stephen J., Willie, Chris K., Sasse, Alexander, Larsen, Peter D., Tzeng, Yu‐Chieh

“…The respiratory component of heart rate variability (respiratory sinus arrhythmia, RSA) has been associated with improved pulmonary gas exchange efficiency in…”
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Role of cerebral blood flow in extreme breath holding by Bain, Anthony R., Ainslie, Philip N., Hoiland, Ryan L., Willie, Chris K., MacLeod, David B., Madden, Dennis, Maslov, Petra Zubin, Drviš, Ivan, Dujić, Željko

“…The role of cerebral blood flow (CBF) on a maximal breath-hold (BH) in ultra-elite divers was examined. Divers (n = 7) performed one control BH, and one BH…”
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Appropriate within-subjects statistical models for the analysis of baroreflex sensitivity by Atkinson, Greg, Batterham, Alan M., Jones, Helen, Taylor, Chloe E., Willie, Chris K., Tzeng, Yu-Chieh

“…Summary An individual’s baroreflex sensitivity is typically described by the relationship between serial manipulations in systolic blood pressure and the…”
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End tidal-to-arterial CO2 and O2 gas gradients at low- and high-altitude during dynamic end-tidal forcing by Tymko, Michael M, Ainslie, Philip N, MacLeod, David B, Willie, Chris K, Foster, Glen E

“…We sought to characterize and quantify the performance of a portable dynamic end-tidal forcing (DEF) system in controlling the partial pressure of arterial CO2…”
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Muscle sympathetic reactivity to apneic and exercise stress in high-altitude Sherpa by Busch, Stephen A, Simpson, Lydia L, Sobierajski, Frances, Riske, Laurel, Ainslie, Philip N, Willie, Chris K, Stembridge, Mike, Moore, Jonathan P, Steinback, Craig D

“…Lowland-dwelling populations exhibit persistent sympathetic hyperactivity at altitude that alters vascular function. High-altitude populations, such as Sherpa,…”
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The effect of α 1 -adrenergic blockade on post-exercise brachial artery flow-mediated dilatation at sea level and high altitude by Tymko, Michael M, Tremblay, Joshua C, Hansen, Alex B, Howe, Connor A, Willie, Chris K, Stembridge, Mike, Green, Daniel J, Hoiland, Ryan L, Subedi, Prajan, Anholm, James D, Ainslie, Philip N

“…Our objective was to quantify endothelial function (via brachial artery flow-mediated dilatation) at sea level (344 m) and high altitude (3800 m) at rest and…”
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Baroreflex, cerebral perfusion, and stroke: integrative physiology at its best by Tzeng, Yu Chieh, Willie, Chris K, Ainslie, Philip N

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Influence of posture on the regulation of cerebral perfusion by Geinas, Jinelle C, Marsden, Katelyn R, Tzeng, Y C, Smirl, Jonathan D, Smith, Kurt J, Willie, Chris K, Lewis, Nia C, Binsted, Gordon, Bailey, Damien M, Bakker, Akke, Day, Trevor A, Ainslie, Philip N

“…Posture has a major influence on cerebral blood flow (CBF). Unlike head-up tilt (HUT), less is known about how CBF is regulated during head-down tilt (HDT). We…”
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The effect of alpha sub(1)-adrenergic blockade on post-exercise brachial artery flow-mediated dilatation at sea level and high altitude by Tymko, Michael M, Tremblay, Joshua C, Hansen, Alex B, Howe, Connor A, Willie, Chris K, Stembridge, Mike, Green, Daniel J, Hoiland, Ryan L, Subedi, Prajan, Anholm, James D, Ainslie, Philip N

“…Key points * Our objective was to quantify endothelial function (via brachial artery flow-mediated dilatation) at sea level (344 m) and high altitude (3800 m)…”
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The effect of [alpha]1-adrenergic blockade on post-exercise brachial artery flow-mediated dilatation at sea level and high altitude by Tymko, Michael M, Tremblay, Joshua C, Hansen, Alex B, Howe, Connor A, Willie, Chris K, Stembridge, Mike, Green, Daniel J, Hoiland, Ryan L, Subedi, Prajan, Anholm, James D, Ainslie, Philip N

“…Key points Our objective was to quantify endothelial function (via brachial artery flow-mediated dilatation) at sea level (344 m) and high altitude (3800 m) at…”
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Cerebral blood flow velocity during passive heat stress in man: influence of stroke volume by Nelson, Michael D, Haykowsky, Mark J, Stickland, Michael K, Smith, Kurt J, Willie, Chris K, Altamirano‐Diaz, Luis A, Petersen, Stewart R, Rieger, Mathew G, Ainslie, Philip N

“…Cerebral blood flow velocity is reduced during heat stress with 50% of this reduction due to hyperventilatory‐induced hypocapnia and subsequent cerebral…”
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Appropriate within-subjects statistical models for the analysis of baroreflex sensitivity: Analysis of baroreflex sensitivity data by Atkinson, Greg, Batterham, Alan M., Jones, Helen, Taylor, Chloe E., Willie, Chris K., Tzeng, Yu-Chieh

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