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     Juerg Senior Member Username: Juerg Post Number: 2459 Registered: 04-2006 |
Or teh question what is validated against what? Measurements of Cardiac Output during Constant Exercises: Comparison of Two Non-Invasive Techniques Authors: N. Tordi2, 3, L. Mourot1, 2, B. Matusheski3, R. L. Hughson3 1 Laboratoire de Physiologie Médecine, Place St Jacques, Besançon, France 2 Laboratoire des Sciences du Sport, Place St Jacques, Besançon, France 3 University of Waterloo, Department of Kinesiology, Waterloo, On, Canada Abstract: We compared cardiac output (CO) determined simultaneously by electrical impedance cardiography method (COICG) and by the CO2 rebreathing technique (CO2REB) during three different steady-state exercises (target heart rate of 120, 140, and 160 min-1) in 8 healthy fit young men. The mean difference correlation coefficient obtained between the values of COICG and CO2REB was 0.85 and the mean difference (COICG-CO2REB) was 0.06 l/min (0.12 %). At 120 min-1, COICG was lower than CO2REB but the tendency was reversed at 140 and 160 min-1 where COICG was higher than CO2REB. This evolution may be explained by the difficultly of using CO2 rebreathing technique at the highest steady-state exercises and by the progressive acidemia due to exercise. The present results suggest that electrical impedance cardiography method provides acceptable evaluation of CO and may favourably replace the CO2 rebreathing technique during mild (or moderate) to high steady-state exercises. Keywords: Impedance cardiography, CO2 rebreathing technique, Indirect Fick principle, Steady state exercise | ||
| Holman325 Senior Member Username: Holman325 Post Number: 26 Registered: 11-2009 |
Interesting development. We (an Exercise Physiologist) and myself are looking to speak with R. Hughson @ UWloo in the coming weeks about a masters or PhD proposal with respect to the Spirotiger and a recent firefighting study they did. We could also discuss their developments, or involvement in this study you quote. ANy thoughts/ideas on what you presented Juerg? Fromwhat I gather Wloo does not have a physio flow, are they using something other than PF? Thanks for the recent infos. Busy night at work here tonight. First time to get to sit down, so I thought I would chime in before I turn in. G'night. Nice work Canada today at the Winter games in Van. |