Carotid baroreflex control of heart rate during acute exposure to simulated altitudes of 3,800 m and 4,300 m.

@article{Sagawa1997CarotidBC,
  title={Carotid baroreflex control of heart rate during acute exposure to simulated altitudes of 3,800 m and 4,300 m.},
  author={Sueko Sagawa and Riko Torii and Ken Nagaya and Futoshi Wada and Yutaka Endo and Keizo Shiraki},
  journal={American journal of physiology. Regulatory, integrative and comparative physiology},
  year={1997},
  volume={273 4},
  pages={R1219-R1223}
}
To examine the baroreflex response in humans during acute high-altitude exposure, the carotid baroreflex cardiac responsiveness was studied using a neck chamber in seven unacclimatized male subjects. Measurements were made in a high-altitude chamber on separate days at sea level and during 1-h exposure at two different altitudes of 3,800 m [partial pressure of oxygen in inspired air (Pi O2 ) = 90 mmHg] and 4,300 m (Pi O2  = 82 mmHg). R-R intervals were plotted against neck chamber pressures… CONTINUE READING

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