[Degree of vascular tonus as a factor of changes in the reactivity of the smooth muscle structures of the blood vessels].
The activeness and functional orientation of the responses of isolated vascular segments to electric stimulation depends on the initial tonic tension. A relatively low degree of extension of the preparations corresponding to a low intravascular pressure creates a tendency towards a response in the form of relaxation. Stimulations of the same intensity cause contractions against the background of a more significant extension of the preparations observed in cases of high pressure. The constrictive effects occuring against the background of significant vessel extensions are interpreted as a manifestation of inadequate responses, similar to the hyperreactivity noted in hypertension.
D000818:Animals; D001012:Aorta, Abdominal / Q000502:physiology; D001158:Arteries / Q000502:physiology*; D002415:Cats; D004558:Electric Stimulation; D005263:Femoral Artery / Q000502:physiology; D006973:Hypertension / Q000209:etiology; D009129:Muscle Tonus; D009130:Muscle, Smooth / Q000502:physiology*; D011817:Rabbits; D014661:Vasoconstriction
Velichina sosudistogo tonusa kak faktor izmeneniĭ v reaktivnosti gladkomyshechnykh struktur sosudov.