[State of the sympathetic-adrenal system and renin activity in the blood in children with primary arterial hypertension in the process of beta-blockader treatment].

The condition of the sympatheticoadrenal system and blood renin activity were studied in healthy children and in children suffering from primary arterial hypertension and treated with beta-blocking agents (Obzidan, Visken). A hypotensive effect was noted in the group of patients suffering from primary arterial hypertension with a high blood renin level and increased excretion of catecholamines in the urine.