[The effect of angiotensin II on the catecholamine content of the blood plasma in rats].

I. v. administration of angiotensin II (0.1, 0.3 and 1.0 microgram/kg/min for 5 min) raised the plasma norepinephrine level in the right atrium and carotid artery in a reverse dose-dependent manner. The veno-arterial difference decreased dose-dependently to 17.4, 7.2 and 0.1 per cent, resp., versus 21.8 per cent in the control group. The plasma norepinephrine level was decreased and the veno-arterial difference was similar to basal level at 1.0 microgram/kg/min dose of angiotensin II for 40 min. Angiotensin II seems to affect the lung uptake and inactivation of norepinephrine in phasic manner.