Search Results - "Tzeng, Y. C"

Assessment of cerebral autoregulation: the quandary of quantification by Tzeng, Y C, Ainslie, P N, Cooke, W H, Peebles, K C, Willie, C K, MacRae, B A, Smirl, J D, Horsman, H M, Rickards, C A

“…We assessed the convergent validity of commonly applied metrics of cerebral autoregulation (CA) to determine the extent to which the metrics can be used…”
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Rebuttal from Y. C. Tzeng and R. B. Panerai by Tzeng, Y. C., Panerai, R. B.

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Assessment of human baroreflex function using carotid ultrasonography: what have we learnt? by Taylor, C. E., Willie, C. K., Ainslie, P. N., Tzeng, Y.-C.

“…The arterial baroreflex is critical to both short‐ and long‐term regulation of blood pressure. However, human baroreflex research has been largely limited to…”
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Fundamental relationships between blood pressure and cerebral blood flow in humans by Tzeng, Y C, MacRae, B A, Ainslie, P N, Chan, G S H

“…Cerebral blood flow responses to transient blood pressure challenges are frequently attributed to cerebral autoregulation (CA), yet accumulating evidence…”
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Postural influences on the mechanical and neural components of the cardiovagal baroreflex by Taylor, C. E., Willie, C. K., Atkinson, G., Jones, H., Tzeng, Y.-C.

“…Aim The ability to maintain arterial blood pressure when faced with a postural challenge has implications for the occurrence of syncope and falls. It has been…”
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Sympathetic regulation of the human cerebrovascular response to carbon dioxide by Peebles, K C, Ball, O G, MacRae, B A, Horsman, H M, Tzeng, Y C

“…Although the cerebrovasculature is known to be exquisitely sensitive to CO(2), there is no consensus on whether the sympathetic nervous system plays a role in…”
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Influence of breathing frequency on the pattern of respiratory sinus arrhythmia and blood pressure: old questions revisited by Sin, P Y W, Galletly, D C, Tzeng, Y C

“…Respiratory sinus arrhythmia (RSA) is classically described as a vagally mediated increase and decrease in heart rate concurrent with inspiration and…”
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Influence of sympathoexcitation at high altitude on cerebrovascular function and ventilatory control in humans by Ainslie, P N, Lucas, S J E, Fan, J-L, Thomas, K N, Cotter, J D, Tzeng, Y C, Burgess, Keith R

“…We sought to determine the influence of sympathoexcitation on dynamic cerebral autoregulation (CA), cerebrovascular reactivity, and ventilatory control in…”
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Respiratory modulation of cardiovagal baroreflex sensitivity by Tzeng, Y. C, Sin, P. Y. W, Lucas, S. J. E, Ainslie, P. N

“…1 Department of Surgery and Anaesthesia, University of Otago, Wellington; 2 Department of Physiology, University of Otago, Dunedin, New Zealand; and 3…”
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A randomized controlled trial to assess the central hemodynamic response to exercise in patients with transient ischaemic attack and minor stroke by Faulkner, J, Tzeng, Y-C, Lambrick, D, Woolley, B, Allan, P D, O'Donnell, T, Lanford, J, Wong, L, Stoner, L

“…Early exercise engagement elicits meaningful changes in peripheral blood pressure in patients diagnosed with transient ischaemic attack (TIA) or minor stroke…”
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Obtaining global land-surface broadband emissivity from MODIS collection 5 spectral albedos using a dynamic learning neural network by Cheng, Jie, Liang, Shunlin, Tzeng, Y.C., Dong, Lixin

“…Surface broadband emissivity (BBE) is a key parameter for estimating surface radiation budget, but it is treated crudely in land-surface models because of a…”
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Human sinus arrhythmia: inconsistencies of a teleological hypothesis by Tzeng, Y C, Sin, P Y W, Galletly, D C

“…Respiratory sinus arrhythmia (RSA) may serve an inherent function in optimizing pulmonary gas exchange efficiency via clustering and scattering of heart beats…”
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Mechanism of cardioventilatory coupling: insights from cardiac pacing, vagotomy, and sinoaortic denervation in the anesthetized rat by Tzeng, Y C, Larsen, P D, Galletly, D C

“…Cardioventilatory coupling (CVC), a temporal alignment between the heartbeat and inspiratory activity, is a major determinant of breath-to-breath variation in…”
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CrossTalk proposal: dynamic cerebral autoregulation should be quantified using spontaneous blood pressure fluctuations by Tzeng, Y. C., Panerai, R. B.

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Effects of hypercapnia and hypoxemia on respiratory sinus arrhythmia in conscious humans during spontaneous respiration by Tzeng, Y C, Larsen, P D, Galletly, D C

“…Normally, at rest, the amplitude of respiratory sinus arrhythmia (RSA) appears to correlate with cardiac vagal tone. However, recent studies showed that, under…”
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Diurnal variation in time to presyncope and associated circulatory changes during a controlled orthostatic challenge by Lewis, N C S, Atkinson, G, Lucas, S J E, Grant, E J M, Jones, H, Tzeng, Y C, Horsman, H, Ainslie, P N

“…Epidemiological data indicate that the risk of neurally mediated syncope is substantially higher in the morning. Syncope is precipitated by cerebral…”
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Regional brain blood flow in man during acute changes in arterial blood gases by Willie, C. K., Macleod, D. B., Shaw, A. D., Smith, K. J., Tzeng, Y. C., Eves, N. D., Ikeda, K., Graham, J., Lewis, N. C., Day, T. A., Ainslie, P. N.

“…Key points •  The partial pressures of arterial carbon dioxide () and oxygen () has a marked influence on brain blood flow. •  It is unclear if the larger…”
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Cardioventilatory coupling in resting human subjects by Tzeng, Y. C., Larsen, P. D., Galletly, D. C.

“…In 48 conscious resting subjects we examined the temporal coupling of heart beat timing and the onset of inspiration (cardioventilatory coupling), and the…”
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Utility of transcranial Doppler ultrasound for the integrative assessment of cerebrovascular function by Willie, C.K., Colino, F.L., Bailey, D.M., Tzeng, Y.C., Binsted, G., Jones, L.W., Haykowsky, M.J., Bellapart, J., Ogoh, S., Smith, K.J., Smirl, J.D., Day, T.A., Lucas, S.J., Eller, L.K., Ainslie, P.N.

“…► There is much utility in the use of TCD to assess cerebrovascular function. ► TCD is an efficient tool to access blood velocities within the cerebral…”
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Relationship between cardioventilatory coupling and pulmonary gas exchange by Sin, P. Y. W., Webber, M. R., Galletly, D. C., Tzeng, Y. C.

“…Summary Cardioventilatory coupling (CVC) is a temporal alignment between the heartbeat and inspiratory activity caused by pulsatile baroreceptor afferent…”
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