[The prevention of hypertension].

The instability is shown of some types of hemodynamics in the course of 24 hours in healthy persons. Healthy persons with initial hyper- and normokinetic types of blood circulation are characterized by a disposition to inadequate reaction of the vascular tone in response to diurnal changes of the minute blood volume. Periodic elevation of the peripheral vascular resistance above permissible levels makes it necessary to carry out prophylactic measures against hypertensive disease.