[Demonstration of a central hypotensive action of lysine vasopressin in the dog].

In chloralose-anaesthetized dogs intravenous infection of lysine-vasopressin (0.01 to 100 mU/kg) induced a dose-dependent increase in blood pressure and a decrease in heart rate. The same dosis injected by central (intracisternal) route induced a constant decrease in blood pressure. These results suggest the involvement of vasopressin in central cardiovascular control and in pathogenesis of some varieties of arterial hypertension.