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Human circulatory responses to prolonged hyperbaric hyperoxia in Predictive Studies VSelected results of cardiocirculatory measurements in healthy volunteers who breathed 100 percent O2 continuously at 3.0 ATA for up to 3.5 hr, at 2.5 ATA for up to 6.0 hr, at 2.0 ATA for up to 11.9 hr, and at 1.5 ATA for up to 19.0 hr are reported. The results indicate that resting hemodynamic responses to prolonged hyperbaric oxygen breathing in man usually consist of small deviations from normal sea-level responses. Rapid onset of bradycardia occurred at all four oxygen pressures investigated. This effect was accompanied by a rate-dependent reduction in cardiac output and a degree of systematic vasoconstriction which were small in magnitude and appeared to be functionally unimportant.
Document ID
19890066329
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Pisarello, J. B.
Clark, J. M.
Lambertsen, C. J.
Gelfand, R.
Date Acquired
August 14, 2013
Publication Date
March 1, 1987
Subject Category
Aerospace Medicine
Accession Number
89A53700
Funding Number(s)
CONTRACT_GRANT: N00014-81-C-0826
CONTRACT_GRANT: NAS9-17238
Distribution Limits
Public
Copyright
Other

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