Degree of vascular tonus as a factor of changes in the reactivity of the smooth muscle structures of the blood vessels
Kulagina, V.P.; Udel'nov, M.G.
Kardiologiia 17(10): 98-103
1977
ISSN/ISBN: 0022-9040 PMID: 599805 Document Number: 113743
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.