Search Results - "Walter Wray, D"

Ultrasound Assessment of Flow-Mediated Dilation by Harris, Ryan A, Nishiyama, Steven K, Wray, D Walter, Richardson, Russell S

“…Developed in 1992, the flow-mediated dilation test is now the most commonly used noninvasive assessment of vascular endothelial function in humans. Since its…”
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Assessment of resistance vessel function in human skeletal muscle: guidelines for experimental design, Doppler ultrasound, and pharmacology by Limberg, Jacqueline K, Casey, Darren P, Trinity, Joel D, Nicholson, Wayne T, Wray, D Walter, Tschakovsky, Michael E, Green, Daniel J, Hellsten, Ylva, Fadel, Paul J, Joyner, Michael J, Padilla, Jaume

“…The introduction of duplex Doppler ultrasound almost half a century ago signified a revolutionary advance in the ability to assess limb blood flow in humans…”
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Vascular function and endothelin-1: tipping the balance between vasodilation and vasoconstriction by Nishiyama, Steven K, Zhao, Jia, Wray, D Walter, Richardson, Russell S

“…Endothelin-1 (ET-1), a potent vasoconstrictor secreted by vascular endothelial cells, has been implicated in the pathophysiology of numerous cardiovascular…”
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Exercise intolerance in heart failure with preserved ejection fraction: Causes, consequences and the journey towards a cure by Bunsawat, Kanokwan, Nelson, Michael D., Hearon, Christopher M., Wray, D. Walter

“…Heart failure with preserved ejection fraction (HFpEF) accounts for over 50% of all heart failure cases nationwide and continues to rise in its prevalence. The…”
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Acute Reversal of Endothelial Dysfunction in the Elderly After Antioxidant Consumption by Wray, D Walter, Nishiyama, Steven K, Harris, Ryan A, Zhao, Jia, McDaniel, John, Fjeldstad, Anette S, Witman, Melissa A.H, Ives, Stephen J, Barrett-OʼKeefe, Zachary, Richardson, Russell S

“…Aging is associated with a pro-oxidant state and a decline in endothelial function. Whether acute, enteral antioxidant treatment can reverse this decrement in…”
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On the contribution of group III and IV muscle afferents to the circulatory response to rhythmic exercise in humans by Amann, Markus, Runnels, Sean, Morgan, David E., Trinity, Joel D., Fjeldstad, Anette S., Wray, D. Walter, Reese, Van R., Richardson, Russell S.

“…Non‐technical summary We investigated the role of thin fibre muscle afferents in the circulatory response to exercise in humans. The results not only document…”
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Exercise-induced brachial artery vasodilation: effects of antioxidants and exercise training in elderly men by Donato, Anthony J, Uberoi, Abhimanyu, Bailey, Damian M, Wray, D Walter, Richardson, Russell S

“…Aging, vascular function, and exercise are thought to have a common link in oxidative stress. Of the 28 subjects studied (young, 26 +/- 2 yr; old, 71 +/- 6…”
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No effect of acute tetrahydrobiopterin (BH 4 ) supplementation on vascular dysfunction in the old by Bisconti, Angela V, Garten, Ryan S, Broxterman, Ryan M, Jarrett, Catherine L, Park, Soung Hun, Shields, Katherine L, Clifton, Heather L, Ratchford, Stephen M, Reese, Van, Zhao, Jia, Wray, D Walter, Richardson, Russell S

“…As a deficiency in tetrahydrobiopterin (BH ), a cofactor for endothelial nitric oxide synthase, has been implicated in the age-related decline in vascular…”
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The Mechanoreflex and Hemodynamic Response to Passive Leg Movement in Heart Failure by IVES, STEPHEN J, AMANN, MARKUS, VENTURELLI, MASSIMO, WITMAN, MELISSA A H, GROOT, H JONATHAN, WRAY, D WALTER, MORGAN, DAVID E, STEHLIK, JOSEF, RICHARDSON, RUSSELL S

“…BACKGROUNDSensitization of mechanosensitive afferents, which contribute to the exercise pressor reflex, has been recognized as a characteristic of patients…”
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Group III/IV muscle afferents impair limb blood in patients with chronic heart failure by Amann, Markus, Venturelli, Massimo, Ives, Stephen J, Morgan, David E, Gmelch, Benjamin, Witman, Melissa A.H, Jonathan Groot, H, Walter Wray, D, Stehlik, Josef, Richardson, Russell S

“…Abstract Objective To better understand the hemodynamic and autonomic reflex abnormalities in heart-failure patients (HF), we investigated the influence of…”
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Progressive handgrip exercise: evidence of nitric oxide-dependent vasodilation and blood flow regulation in humans by Wray, D Walter, Witman, Melissa A H, Ives, Stephen J, McDaniel, John, Fjeldstad, Anette S, Trinity, Joel D, Conklin, Jamie D, Supiano, Mark A, Richardson, Russell S

“…In the peripheral circulation, nitric oxide (NO) is released in response to shear stress across vascular endothelial cells. We sought to assess the degree to…”
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Does Brachial Artery Flow–Mediated Vasodilation Provide a Bioassay for NO? by Wray, D Walter, Witman, Melissa A.H, Ives, Stephen J, McDaniel, John, Trinity, Joel D, Conklin, Jamie D, Supiano, Mark A, Richardson, Russell S

“…This study sought to better define the role of NO in brachial artery flow–mediated vasodilation (FMD) in young, healthy humans. Brachial artery blood velocity…”
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Limb-specific differences in flow-mediated dilation: the role of shear rate by Nishiyama, Steven K, Walter Wray, D, Berkstresser, Kimberly, Ramaswamy, Murali, Richardson, Russell S

“…1 Department of Medicine, University of California, San Diego, La Jolla, California; and 2 Departments of Medicine and of Exercise and Sport Science,…”
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Human skeletal muscle intracellular oxygenation: the impact of ambient oxygen availability by Richardson, Russell S., Duteil, Sandrine, Wary, Claire, Wray, D. Walter, Hoff, Jan, Carlier, Pierre G.

“…Intracellular oxygen (O 2 ) availability and the impact of ambient hypoxia have far reaching ramifications in terms of cell signalling and homeostasis;…”
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Oral antioxidants and cardiovascular health in the exercise-trained and untrained elderly: a radically different outcome by Wray, D Walter, Uberoi, Abhimanyu, Lawrenson, Lesley, Bailey, Damian M, Richardson, Russell S

“…Both antioxidant supplementation and exercise training have been identified as interventions which may reduce oxidative stress and thus improve cardiovascular…”
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Ascorbic acid improves brachial artery vasodilation during progressive handgrip exercise in the elderly through a nitric oxide-mediated mechanism by Trinity, Joel D, Wray, D Walter, Witman, Melissa A H, Layec, Gwenael, Barrett-O'Keefe, Zachary, Ives, Stephen J, Conklin, Jamie D, Reese, Van, Zhao, Jia, Richardson, Russell S

“…The proposed mechanistic link between the age-related attenuation in vascular function and free radicals is an attractive hypothesis; however, direct evidence…”
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Exercise-induced brachial artery blood flow and vascular function is impaired in systemic sclerosis by Machin, Daniel R, Clifton, Heather L, Garten, Ryan S, Gifford, Jayson R, Richardson, Russell S, Wray, D Walter, Frech, Tracy M, Donato, Anthony J

“…Systemic sclerosis (SSc) is a rare autoimmune disease characterized by debilitating fibrosis and vascular dysfunction; however, little is known about the…”
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Differential effects of aging on limb blood flow in humans by Donato, Anthony J, Uberoi, Abhimanyu, Wray, D Walter, Nishiyama, Steven, Lawrenson, Lesley, Richardson, Russell S

“…Aging appears to attenuate leg blood flow during exercise; in contrast, such data are scant and do not support this contention in the arm. Therefore, to…”
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Oral antioxidants improve leg blood flow during exercise in patients with chronic obstructive pulmonary disease by Rossman, Matthew J, Trinity, Joel D, Garten, Ryan S, Ives, Stephen J, Conklin, Jamie D, Barrett-O'Keefe, Zachary, Witman, Melissa A H, Bledsoe, Amber D, Morgan, David E, Runnels, Sean, Reese, Van R, Zhao, Jia, Amann, Markus, Wray, D Walter, Richardson, Russell S

“…The consequence of elevated oxidative stress on exercising skeletal muscle blood flow as well as the transport and utilization of O2 in patients with chronic…”
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Aging affects vascular structure and function in a limb-specific manner by Nishiyama, Steven K, Wray, D. Walter, Richardson, Russell S

“…1 Department of Medicine, University of California, San Diego, La Jolla, California; 2 Department of Medicine, Division of Geriatrics, University of Utah, Salt…”
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