Российская академия наук



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The reactivity of brain structures during HRV biofeedback session in persons with different levels of blood pressure

Poskotinova L.V.1,2, Demin D.B.1,2, Krivonogova E.V.1,2, Dieva M.N.3, Khasanova N.M.4

The Institute of Environmental Physiology, Russian Acad. Sci., Ural Branch, Institute of Medical-Biological Research NArFU named after M.V. Lomonosov, 3Arkhangelsk City Out-patients' Clinic № 2, 4Northern State Medical University, Arkhangelsk, Russia, liliya200572@mail.ru
The purpose of research is to determine characteristics of brain activity in a single biofeedback session to enhance vagal effects on heart rhythm in people 30-55 years with normal blood pressure (BP), hypertension without compliance to treatment and hypertension on a background of antihypertensive therapy (monotherapy with angiotensin-converting enzyme inhibitors or beta-blockers).

In people with normal blood pressure (less 140/90 mm Hg) revealed high success biofeedback parameters of heart rate variability (HRV), a significant reduction in systolic blood pressure and sympathetic activity, as well as a significant increase in oxygen saturation of blood. During biofeedback session they are a significant increase in the power of alpha- activity of the electroencephalogram (EEG) in the occipital regions and right posterior-frontal region. Persons with uncorrected arterial hypertension have lowest successful biofeedback session, high sympathetic reactivity and decreased oxygen saturation of blood. EEG changes were in different variances at the same time. In people taking antihypertensive drugs the vagal reactivity mechanisms more pronounced than in those with uncorrected hypertension, which is reflected in a significant increase in their total power spectrum of heart rate variability in comparison with the background and the tendency to increase blood oxygen saturation in the biofeedback session. EEG changes reflect signs of increasing power of alpha-activity in the occipital and posterior-frontal regions of both hemispheres of the brain. Thus, the ability to HRV biofeedback in order to increase the total power spectrum of HRV during standard short time (5 minutes) may be regarded as a test of determining the safety reserves of vagal autonomic regulation of cardiac function in patients with high blood pressure. The severity of the process of the main EEG rhythm desynchronization combined with the low success cardio- training reflects the degree of impairment of cortical-visceral connections in people with uncorrected hypertension.



This research work was supported by a grant of the RAS Presidium "Fundamental sciences – to medicine» № 12-P-4-1038.

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