Effects of parabolic flight on abdominal arterial pressure in conscious rats.
Biol Sci Space
; 17(3): 223-4, 2003 Oct.
Article
em En
| MEDLINE
| ID: mdl-14676387
ABSTRACT
Abdominal arterial pressure during parabolic flight was measured using a telemetry system to clarify the acute effect of microgravity on hemodynamics in conscious rats. The microgravity condition was elicited by three different levels of entry gravity, i.e. 2 G, 1.5 G and 1 G. On exposure to 2 G, mean aortic pressure (MBP) increased up to 118.7 mm Hg +/- 7.3 compared with the value at 1 G (107.0 +/- 6.3 mm Hg, n=6). The value at microgravity preceded by 2 G was 118.0 mmHg +/- 5.2 mm HG and it was still higher than at 1 G. When 1.5 G was elicited before microgravity exposure, MBP also increased (1.5 G 114.9 +/- 5.3 vs 1 G 105.8+/-5.0 mm Hg) and the value at microgravity was 117.3 + /- 5.3 mmHg. During pre-microgravity maneuver with 1 G, no changes were observed compared with the control level at 1 G (pre-microgravity 105.0 +/- 5.0 vs 1G 104.8 +/- 5.1 mm Hg ), whereas the MBP increased up to 117.0 +/- 6.5 mm Hg on exposure to microgravity. From these results, we found that in conscious rat MBP increase during acute microgravity exposure with either 1 G or hyper-G entry.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Aorta Abdominal
/
Voo Espacial
/
Ausência de Peso
/
Pressão Sanguínea
/
Hipergravidade
Limite:
Animals
Idioma:
En
Revista:
Biol Sci Space
Assunto da revista:
MEDICINA AEROESPACIAL
Ano de publicação:
2003
Tipo de documento:
Article