Search Results - "Loeppky, J. A"

Does heat acclimation improve exercise capacity at altitude? A cross-tolerance model by White, A C, Salgado, R M, Schneider, S, Loeppky, J A, Astorino, T A, Mermier, C M

“…New approaches to inducing altitude acclimation in a relatively short timeframe are needed, as it is not practical for many soldiers and athletes to gain…”
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Exercise exacerbates acute mountain sickness at simulated high altitude by Roach, R. C, Maes, D, Sandoval, D, Robergs, R. A, Icenogle, M, Hinghofer-Szalkay, H, Lium, D, Loeppky, J. A

“…1  Division of Physiology, Department of Life Sciences, New Mexico Highlands University, Las Vegas 87701-9000; 2  Lovelace Respiratory Research Institutes,…”
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Variations in exercise ventilation in hypoxia will affect oxygen uptake by Loeppky, J A, Salgado, R M, Sheard, A C, Kuethe, D O, Mermier, C M

“…Reports of VO2 response differences between normoxia and hypoxia during incremental exercise do not agree. In this study VO2 and VE were obtained from 15-s…”
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Plasma volume after heat acclimation: Variations due to season, fitness and methods of measurement by Loeppky, J A

“…The reported magnitude of plasma volume increase (Δ%PV) following heat acclimation (HA) varies widely. Variations may result from differences in measurement…”
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Acute mountain sickness: increased severity during simulated altitude compared with normobaric hypoxia by Roach, Robert C, Loeppky, Jack A, Icenogle, Milton V

“…Robert C. Roach, Jack A. Loeppky, and Milton V. Icenogle Copenhagen Muscle Research Center, Rigshospitalet, DK 2200 Copenhagen N, Denmark; The Lovelace…”
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Effect of head-down tilt on brain water distribution by Caprihan, A, Sanders, J A, Cheng, H A, Loeppky, J A

“…Vascular and tissue fluid dynamics in the microgravity of space environments is commonly simulated by head-down tilt (HDT). Previous reports have indicated…”
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Effects of acid-base status on acute hypoxic pulmonary vasoconstriction and gas exchange by Loeppky, J A, Scotto, P, Riedel, C E, Roach, R C, Chick, T W

“…To investigate the relationship between hypoxic pulmonary vasoconstriction and respiratory and metabolic acidosis and respiratory alkalosis, the pulmonary gas…”
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V E STPD as a measure of ventilatory acclimatization to hypobaric hypoxia by Loeppky, J A, Sheard, A C, Salgado, R M, Mermier, C M

“…This study compared the ventilation response to an incremental ergometer exercise at two altitudes: 633 mmHg (resident altitude = 1,600 m) and following acute…”
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Beat-by-beat stroke volume assessment by pulsed Doppler in upright and supine exercise by Loeppky, J A, Greene, E R, Hoekenga, D E, Caprihan, A, Luft, U C

“…A 3.0 MHz pulsed Doppler echocardiography was used to estimate instantaneous stroke volume (SV) and cardiac output (Q) in eight men during steady-state supine…”
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Acute effects of head-down tilt and hypoxia on modulators of fluid homeostasis by Whitson, P A, Cintron, N M, Pietrzyk, R A, Scotto, P, Loeppky, J A

“…In an effort to understand the interaction between acute postural fluid shifts and hypoxia on hormonal regulation of fluid homeostasis, the authors measured…”
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Abnormal cerebrovascular responses to CO2 in sleep apnea patients by LOEPPKY, J. A, MIRANDA, F. G, ELDRIDGE, M. W

“…The responses of common carotid blood flow (CCF), pressure (BP), and resistance (R) to variations in respiratory gases were compared during waking periods in…”
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Comparison of noninvasive pulsed Doppler and Fick measurements of stroke volume in cardiac patients by Loeppky, J A, Hoekenga, D E, Greene, E R, Luft, U C

“…We compared simultaneous measurements of stroke volume by direct Fick (SVF) and noninvasive pulsed Doppler (SVD) techniques in 15 resting, supine cardiac…”
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Arterial-alveolar CO2 equilibration in exercising dogs during prolonged rebreathing by Loeppky, J A, Scotto, P, Rieke, H, Meyer, M, Piiper, J

“…Arterial-alveolar equilibration of CO2 during exercise was studied by normoxic CO2 rebreathing in six dogs prepared with a chronic tracheostomy and…”
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Mean alveolar gases and alveolar-arterial gradients in pulmonary patients by Luft, U C, Loeppky, J A, Mostyn, E M

“…In view of uncertainties about the best way to estimate mean alveolar gases in patients with ventilation-perfusion inequalities, three different methods were…”
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The effects of low levels of CO2 on ventilation during rest and exercise by Loeppky, J A

“…Measurements of pulmonary gas exchange are especially sensitive to low levels of CO2 in the environment; this is an important consideration in measurements in…”
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Sleep apnea and autonomic cerebrovascular dysfunction by LEOPPKY, J. A, VOYLES, W. F, ELDRIDGE, M. W, SIKES, C. W

“…Changes in common carotid blood flow (CCF) and resistance index (RI), calculated from velocity waveforms by a noninvasive pulsed Doppler technique, were…”
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Fluctuations in O2 stores and gas exchange with passive changes in posture by Loeppky, J A, Luft, U C

“…To clarify the role of O2 stores in the fluctuations in VO2 observed with changing posture, O2 intake (Veo2) and pulmonary capillary O2 transfer (Vpco2) were…”
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Total body water and lean body mass estimated by ethanol dilution by Loeppky, J A, Myhre, L G, Venters, M D, Luft, U C

“…Total body water (TBW) was determined on 35 subjects with a tritium (HTO) and an ethanol (ETH) dilution method, the latter using breath analyses for blood…”
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Acute ventilatory response to simulated altitude, normobaric hypoxia, and hypobaria by Loeppky, J A, Scotto, P, Roach, R C

“…Some reports claim that ventilation (VE) is greater in human subjects in normobaric hypoxia than at altitude following an equivalent drop in inspired PO2…”
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Ventilation during simulated altitude, normobaric hypoxia and normoxic hypobaria by Loeppky, J.A., Icenogle, M., Scotto, P., Robergs, R., Hinghofer-Szalkay, H., Roach, R.C.

“…To investigate the possible effect of hypobaria on ventilation (V̇ e) at high altitude, we exposed nine men to three conditions for 10 h in a chamber on…”
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