Affiliation:
1. National Medical Research Center for Therapy and Preventive Medicine; Institute of Biomedical Problems of the russian Academy of Sciences (IBMP)
2. National Medical Research Center for Therapy and Preventive Medicine
3. National Medical Research Center for Therapy and Preventive Medicine; Patrice Lumumba Peoples’ Friendship University of Russia
Abstract
Objective. To study the dynamics of microcirculatory blood flow in the skin during a course of use of the electrical stimulator AVR-051 in men of low and moderate cardiovascular risk with newly diagnosed arterial hypertension. Materials and methods. The single-center placebo-controlled study included 44 men of working age (30–60 years) with low and moderate cardiovascular risk with newly diagnosed hypertension, who were randomly divided into 2 groups. The control group (CG) included 30 men who underwent electrical stimulation with a commercial device. The placebo group (PG) included 14 men who used the AVR-051 device, with the electrostimulation function disabled. The study design included 3 visits. After visit 1 and randomization, the subjects underwent electrical stimulation/sham at home 2 times a day for 14 days. Visit 2 was carried out immediately after the end of the physiotherapy course, visit 3 was 14 days after visit 2. At each visit, a one-stage comprehensive study of microcirculation (video capillaroscopy, laser Doppler flowmetry and photoplethysmography) and 24-hour blood pressure monitoring on the left upper limb were performed. Results. In the CG, while blood pressure decreased at visits 2 and 3 by 5.5/3.5 and 7.5/3.5 mm Hg relative to the initial values, statistically significant changes at the level of the microvascular bed were recorded only at visit 3: an increase in the functional density of the capillary network by 10 cap/mm2, an increase in the amplitude of pulse oscillations of blood flow from 0.68 to 1.06 PU and the perfusion contribution of pulse oscillations from 3.89 to 8.22 %, a decrease in the augmentation index from 6.25 to 3.2 %, a decrease in the stiffness index from 7.45 to 7 cm/s and the reflection index from 37.4 to 30.2 %, respectively. In the GP, no reliable dynamics was recorded for any of the analyzed parameters. Conclusion. Positive dynamics at the level of the microvascular bed of the skin is a consequence of a decrease in blood pressure level against the background of systemic normalization of sympathetic tone. After the course of electrical stimulation, a hypotensive effect is observed in 86.7 % of men at early stages of the hypertension development, and in 20 % of them, a complete normalization of blood pressure level is observed.
Publisher
FSBEI HE I.P. Pavlov SPbSMU MOH Russia
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