Cardiac output during exercise by the open circuit acetylene washin method: comparison with direct Fick.

@article{Johnson2000CardiacOD,
  title={Cardiac output during exercise by the open circuit acetylene washin method: comparison with direct Fick.},
  author={Bruce D. Johnson and Kenneth C. Beck and David N Proctor and Jl Miller and Niki M. Dietz and Michael J. Joyner},
  journal={Journal of applied physiology},
  year={2000},
  volume={88 5},
  pages={1650-8}
}
An open-circuit (OpCirc) acetylene uptake cardiac output (QT) method was modified for use during exercise. Two computational techniques were used. OpCirc1 was based on the integrated uptake vs. end-tidal change in acetylene, and OpCirc2 was based on an iterative finite difference modeling method. Six subjects [28-44 yr, peak oxygen consumption (VO(2)) = 120% predicted] performed cycle ergometry exercise to compare QT using OpCirc and direct Fick methods. An incremental protocol was repeated… CONTINUE READING

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