| タイトル | Cardiovascular Adjustments to Gravitational Stress |
| 本文（外部サイト） | http://hdl.handle.net/2060/19910016260 |
| 著者（英） | Stone, H. Lowell; Blomqvist, C. Gunnar |
| 著者所属（英） | Texas Univ. |
| 発行日 | 1991-05-01 |
| 言語 | eng |
| 内容記述 | The effects of gravity on the cardiovascular system must be taken into account whenever a hemodynamic assessment is made. All intravascular pressure have a gravity-dependent hydrostatic component. The interaction between the gravitational field, the position of the body, and the functional characteristics of the blood vessels determines the distribution of intravascular volume. In turn this distribution largely determines cardiac pump function. Multiple control mechanisms are activated to preserve optimal tissue perfusion when the magnitude of the gravitational field or its direction relative to the body changes. Humans are particularly sensitive to such changes because of the combination of their normally erect posture and the large body mass and blood volume below the level of the heart. Current aerospace technology also exposes human subjects to extreme variations in the gravitational forces that range from zero during space travel to as much an nine-times normal during operation of high-performance military aircraft. This chapter therefore emphasizes human physiology. |
| NASA分類 | AEROSPACE MEDICINE |
| レポートNO | 91N25574 |
| 権利 | Copyright, Distribution under U.S. Government purpose rights |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/132024 |
