| タイトル | Cardiovascular responses of men and women to lower body negative pressure |
| 著者（英） | Gerber, R. L.; Payne, P. A.; Williams, B. A.; Kirk, P. J.; Newton, S. D.; Montgomery, L. D. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 1977-02-01 |
| 言語 | eng |
| 内容記述 | Changes in blood flow and blood redistribution were measured by impedance plethysmography in the pelvic and leg regions of six male and four female subjects during three 5-min exposures to -20, -40, and -60 mm Hg lower body negative pressure (LBNP). Female subjects demonstrated significantly higher mean heart rate and lower leg blood flow indices than the male subjects during the recumbent control periods. Men had slightly higher mean resting systolic and diastolic blood pressures and higher mean control pelvic blood indices. Women demonstrated significantly less blood pooling in the legs and slightly less in the pelvic region than the men. All of the 18 tests with male subjects at -60 mm Hg were completed without initial signs of syncope, while only two of the tests with women were completed successfully without the subject exhibiting presyncopal conditions. Results indicate that impedance plethysmography can be used to measure segmental cardiovascular responses during LBNP and that females may be less tolerant to -60 mm Hg LBNP than males. |
| NASA分類 | AEROSPACE MEDICINE |
| レポートNO | 77A24507 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/438933 |
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