[The effect of the initial (controllable) tonus of arterial vessels on the formation of systemic pressor reactions].

A significant decrease of systolic and diastolic effects occurred when initial level of the blood pressure had been elevated from 60 to 200 mm Hg with mesathone and from 70 to 185 mm Hg with polyglukine in anaesthesized rats. A reverse linear correlation was found between the above parameters at a high degree of connection for both agents. "Vascular" and "cardiac" mechanisms of revealed relationships are discussed.