The integrated concentration of plasma renin activity and aldosterone in essential hypertension.

Measurement of the integrated concentration is most suited for the study of blood components that fluctuate rapidly. The integrated concentration of plasma aldosterone (IC-ALDO) and plasma renin activity (IC-PRA) were measured in 24 patients with essential hypertension and in 10 normal adult subjects, using a non-thrombogenic 24-hour constant blood withdrawal system. The integrated concentration of plasma aldosterone in the control subjects was 7.

Effect of food intake on the metabolic clearance rate of aldosterone.

The effect of eating on the metabolic clearance rate (MCR) of aldosterone was investigated in 10 adult individuals. 3H-aldosterone was infused continuously over a period of 5 h while the subjects remained supine. Three h after the start of the infusion, each subject ate a bowl of soup.