Carbon Dioxide

The effects of graded changes in oxygen and carbon dioxide tension on coronary blood velocity independent of myocardial energy demand.
In humans, coronary blood flow is tightly regulated by microvessels within the myocardium to match myocardial energy demand. However, …
Lindsey M Boulet, Mike Stembridge, Michael M Tymko, Joshua C Tremblay, Glen E Foster
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Role of CO2 in the cerebral hyperemic response to incremental normoxic and hyperoxic exercise.
Cerebral blood flow (CBF) is temporally related to exercise-induced changes in partial pressure of end-tidal carbon dioxide (PetCO2 ); …
Kurt J Smith, K W Wildfong, R L Hoiland, M Harper, N C Lewis, A Pool, S L Smith, T Kuca, G E Foster, P N Ainslie
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Comparing and characterizing transient and steady-state tests of the peripheral chemoreflex in humans
Jamie R Pfoh, Michael M Tymko, Maria Abrosimova, Lindsey M Boulet, Glen E Foster, Anthony R Bain, Philip N Ainslie, Craig D Steinback, Christina D Bruce, Trevor A Day
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Measuring the human ventilatory and cerebral blood flow response to CO$_textrm2$: a technical consideration for the end-tidal-to-arterial gas gradient
Michael M Tymko, Ryan L Hoiland, Tomas Kuca, Lindsey M Boulet, Joshua C Tremblay, Bryenna K Pinske, Alexandra M Williams, Glen E Foster
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End tidal-to-arterial CO$_textrm2$ and O$_textrm2$ gas gradients at low- and high-altitude during dynamic end-tidal forcing.
We sought to characterize and quantify the performance of a portable dynamic end-tidal forcing (DEF) system in controlling the partial …
Michael M Tymko, Philip N Ainslie, David B MacLeod, Chris K Willie, Glen E Foster
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The contribution of arterial blood gases in cerebral blood flow regulation and fuel utilization in man at high altitude.
The effects of partial acclimatization to high altitude (HA; 5,050 m) on cerebral metabolism and cerebrovascular function have not been …
Christopher K Willie, David B MacLeod, Kurt J Smith, Nia C Lewis, Glen E Foster, Keita Ikeda, Ryan L Hoiland, Philip N Ainslie
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Regional changes in brain blood flow during severe passive hyperthermia; the effects of PaCO2 and extra-cranial blood flow.
We investigated; 1) the regional distribution of cerebral blood flow (CBF), 2) the influence of end-tidal PCO2 (PETCO2) on CBF, and 3) …
Anthony Richard Bain, Kurt J Smith, Nia C Lewis, Glen Edward Foster, Kevin W Wildfong, Christopher K Willie, Geoffrey L Hartley, Stephen S Cheung, Philip N Ainslie
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Dynamic cerebral autoregulation during and following acute hypoxia: role of carbon dioxide.
Previous research has shown an inconsistent effect of hypoxia on dynamic cerebral autoregulation (dCA), which may be explained by …
Jordan S Querido, Philip N Ainslie, Glen E Foster, William R Henderson, John R Halliwill, Najib T Ayas, A William Sheel
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High on altitude: new attitudes toward human cerebral blood flow regulation and altitude acclimatization
Glen E. Foster
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