[Change in the central and regional (brain) hemodynamics in the treatment of hypertension using beta-adrenergic blockaders].

The haemodynamic parameters were studied dynamically by way of noninvasive techniques--tetrapolar thoracic rheography in the course of treatment of 48 patients with essential hypertension Stage IB and IIA urth beta-blocking agents Obsidan and Visken. It was found that as early as by the 5th day of therapy the stroke volume and heart rate decreased, the maximum fall being noted after 2-3 weeks of treatment. The reflex elevation of the total peripheral resistance was moderate, as a result of which a gradual reduction of the arterial pressure developed. The state of the cerebral circulation significantly improved in the course of the treatment (as shown by rheoencephalography) and the tone of the cerebral arteries decreased. After 2-3 weeks of beta-blockers therapy favourable shifts were observed in the response of the general and cerebral haemodynamics to the orthostatic test.