PMID: 6104745Mar 1, 1980Paper

Pharmacologic analysis of the physiologic mechanisms of the hemodynamics of orthostatic tolerance

Kosmicheskaia biologiia i aviakosmicheskaia meditsina
L I Osadchiĭ

Abstract

In urethane anesthesized rats, securinine brought about a distinct increase in compensatory reactions of arterial pressure and cardiac output during an upright tilt at 45 degrees. The experiments also showed a substantial increase in compensatory recovery of the volume velocity of circulation in the posterior vena cava. Myorelaxant induced arrest of contractile function of skeletal muscles prior to securinine administration reversed compensatory reactions of arterial pressure and cardiac output during tilt test.

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