[The dependence of ortho- and antiorthostatic hemodynamic reactions on the initial (controllable) tonus of the arterial vessels in rats].
Ortho- and antiorthostatic responses of the hemodynamics were compared by numerous parameters in anesthetised rats. In particular, in antiorthostatism the decrease of diastolic pressure as well as systolic one was greater at a lower initial arterial pressure. The data obtained suggest that, in orthostasis, the constrictor vascular compensatory responses are mainly revealed at a high initial arterial pressure. This mechanism of the compensation is less obvious in antiorthostatism.
Osadchiĭ
T I
TI
Balueva
T V
TV
Sergeev
I V
IV
D000804:Angiotensin II / Q000494:pharmacology; D000818:Animals; D001158:Arteries / Q000187:drug effects / Q000502:physiology*; D001794:Blood Pressure / Q000187:drug effects / Q000502:physiology; D003971:Diastole / Q000187:drug effects; D018475:Head-Down Tilt / Q000502:physiology*; D008297:Male; D011187:Posture / Q000502:physiology*; D051381:Rats; D017208:Rats, Wistar; D013599:Systole / Q000187:drug effects; D013997:Time Factors; D018924:Vascular Capacitance / Q000187:drug effects / Q000502:physiology*
D000804:Angiotensin II