Neurovegetative Regulation Research Articles

Peculiarities of neurovegetative regulation in children and adolescents with sarcopenia according to heart rate variability indicators.

Aim: To find what extent the state of neurovegetative regulation in children and adolescents with sarcopenia differs from their peers without signs of sarcopenia. Materials and Methods: The sarcopenic index and hand grip strength, which were simultaneously in the range below the 25th percentile of the reference values of these indicators for the corresponding age and gender, were considered the criteria for sarcopenia. A bioelectrical impedance analyzer, "TANITA MC- 780 MA" (Japan), was used to obtain the SI indicator. The functional state of autonomic regulation was assessed using the HRV-scanner hardware and software complex (Biosign, Germany). Results: After processing the examination results according to our algorithm, it became clear that there were no children with signs of autonomic dysfunction in the GWS and BWS subgroups. At the same time, in the GS and BS subgroups, the percentage of children with autonomic dysfunction was 69% (30 out of 42 people) and 74% (28 out of 38 people), respectively. Conclusions: Registration of a standard 5-minute rhythmocardiogram against the background of spontaneous breathing should be supplemented with a 1-minute breathing test in the diaphragmatic breathing mode with an imposed rhythm of 6 breathing movements per minute, which allows for assessing the presence or absence of parasympathetic dysfunction.

The Neurovegetative Status of Children 5-7 Years Old

The purpose of the article is to reveal the peculiarities of the neurovegetative status of children of senior preschool age. The article exposes the importance of the autonomic nervous system, features of electrical activity, cerebral blood flow on functioning of the child’s body. Childhood is a sensitive period of development of many neurophysiological and physiological functions. In children the electrical activity of the brain can be considered as an indicator of general properties of the nervous system and takes the leading place in the structure of the neurodynamic constitution of a person and some individual-psychological differences underlying them. Prolonged psycho-emotional overstrain, a high level of personal anxiety in children and the etiological factor cause increased activity of adaptation-compensatory reactions, in which the most important role is played by the autonomic nervous system. Disturbances of neurovegetative regulation, occurring practically in all diseases, under the influence of a huge number of damaging factors are nonspecific, adaptive-compensatory. In children, psycho-vegetative syndrome, characterized by a combination of psycho-emotional and vegetative disorders is encountered in most cases.

Efficacy of Dynamic Еlectric Neurostimulation in the Complex Treatment of Patients with Arterial Hypertension

Low adherence of patients with arterial hypertension to regular therapy increases the risk of fatal complications. Patients’ motivation for treatment can be increased by non-drug methods of exposure. Aim. To evaluate the effectiveness of the inclusion of dynamic electric neurostimulation in the treatment regimens of patients with arterial hypertension to control blood pressure (BP) levels. Material and methods. 60 patients aged 25-55 years old with verified diagnosis of arterial hypertension (I-II degree) were examined in Novosibirsk City Clinical Hospital № 2. The 1st group (the main group, n=30) received a 15-day course of acupuncture of the neiguan point from the apparatus «Leomax-Cardio Compact» in addition to the standard therapy; the 2nd group (comparison group, n=30) received the standard treatment complex and simulation of acupuncture exposure. Patients were trained to use the «LeomaxCardio compact» device and to perform self-monitoring of arterial pressure (BP) from the UA-767 (AND) device. The checkup included carbohydrate, lipid metabolism, kidney function, electrocardiography assessment, daily BP monitoring. Results and discussion. By the end of observation, the target BP levels in the 1st group patients were 70.0% achieved, we managed to correct the variability of systolic and diastolic BP relative to the initial values by 1.3 and 1.6 times respectively, to decrease the rate of morning rise of systolic BP by 1.3 times, to increase the frequency of the variant of daily BP profile “dippers” by 1.3 times and to decrease the number of “non-dippers” by 1.7 times, which differed from the similar indicators in the 2nd group. Electro-puncture with «LeomaxCardio Compact» may have an antihypertensive effect due its effect on the suprasegmental parts of the autonomic nervous system. Conclusion. Inclusion of electropuncture from the device Leomax-Cardio Compact in the treatment regimens of patients with uncomplicated arterial hypertension allows to correct the neurovegetative regulation, which allows effective control of the target values of systemic hemodynamics

Single Vibroacoustic Impact Effect of Singing Bowls over the Psycho-Emotional State and Cardiovascular System Work

This article presents a two-stage study result of the author's method of vibroacoustic massage using singing bowls application. At the first stage, the effect of vibroacoustic massage single application over psycho-emotional characteristics was studied. 19 studied volunteers took part in our study. The testing results before and after exposures were compared according to the WAM (Weighted average mark), Zung, and Spielberg-Khanin tests. The study of the psycho-emotional sphere showed that after the vibroacoustic massage procedure, the indicators of "well-being" and "activity" of the WAM test significantly improved (p = 0.002). In addition, the depression level determined by the Zung test, personal anxiety indicators (p = 0.004), and situational anxiety ones (p = 0.028) decreased. At the second stage, 62 volunteers were divided into two groups. The first group underwent a vibroacoustic massage session according to the patented author's method. The second group received only acoustic exposure using only singing bowls. Differences in the Kerdo index were revealed in the dynamics, and in the first group, the changes were less significant than in the second one. Changes in heart rate variability characteristics for both groups were similar: there was an increase in parasympathetic influences at rest and during the orthostatic test (increased levels of RMSSD (Root Mean Square of Successive Differences), NN50, pNN50) and a decrease in sympathetic effects at rest and their slight increase with orthostatic loading (TINN, RR triangular index). The dynamics were more significant in the first group that received a vibroacoustic massage session. When assessing changes in the neurovegetative regulation levels activity of the heart rhythm, the main difference was associated with very low-frequency waves power dynamics during the orthostatic test. Thus, vibroacoustic massage using singing bowls improves the psycho-emotional state, reduces depression and anxiety, and increases Parasympaticus (autonomic nervous system) activity.

Neurovegetative regulation of heart rhythm and physical development of children under intelligent loads.

Neurovegetative regulation of heart rhythm and physical development of children under intelligent loads.

COMPARATIVE-AGE CHARACTERISTICS OF THE STATE OF THE NEUROVEGATIVE REGULATION OF THE GASTROINTESTINAL TRACT IN INTENSIVE CARE PATIENTS

Introduction. The autonomic nervous system is considered to be the leading adapter of the body to changing conditions of existence The intestine is subjected to massive irritating effects, and therefore is actively regulated by the autonomic nervous system, and itself, at the same time, is its regulator. In intensive care conditions, autonomic reactions change under the influence of critical state inducers. The purpose of the study: a comparative analysis of the neurovegetative regulation of the gastrointestinal tract in patients under intensive care in an age-related aspect. Materials and methods. Under observation were 70 patients in need of intensive care. Of these, 30 are children of the first month of life and 40 are adult patients. The study applied methods of cardiointervalography and assessment of the degree of gastrointestinal failure syndrome. The results of the study. The analysis of cardiointervalograms showed a relatively equal tension of the sympathetic part of the autonomic nervous system, regardless of age. However, in children, in comparison with adults, a more pronounced relative dysbalance of autonomic regulation in favor of humoral sympathetic influences is noted, which significantly increases the stress index in childhood. Despite the pronounced activity of the humoral channel for regulating autonomic homeostasis, it was not a factor affecting the severity of gastrointestinal failure syndrome. Therefore, this factor may be trigger in the formation of intestinal dysfunction, but not determining in the formation of its severity. Correlation in the adult group indicates the predominance of parasympathetic influences in the formation of gastrointestinal failure syndrome. Among children, unlike adults, the formation of this syndrome is associated not only with changes in the parasympathetic department, but with hypersympaticotonia. Conclusions. Regardless of the age, in patients with intensive care, an increase in tension of the sympathetic part of the autonomic nervous system is noted. In children, compared with adults, a markedly pronounced activity of humoral sympathetic influences was noted. At the same time, parasympathetic activity is the decisive factor in the progression of gastrointestinal failure syndrome in adults, and hypersympathicotonia in children.

CHARACTERISTICS OF THE HEART RHYTHM VARIABILITY IN RESIDENTS OF MIDDLE OB REGION WITH DERMAL DISEASES

The aim of the study was to identify the characteristics of heart rate variability (HRV) in patients with chronic dermatoses, citizens of the Middle Ob Region. Methods. 74 patients with chronic dermal diseases (psoriasis and eczema), as well as 37 people who were included in the control group, were examined using the method of variational pulse oximetry using the Elox-01 hardware complex and the ELOGRAPH software product. The assessment of the constituent characteristics of HRV was carried out using different approaches: methods of mathematical statistics using non-parametric tests of Wilcoxon, Shapiro-Wilk and multivariate analysis of multidimensional phase spaces, which determined the evidential base for quantitative measures and diagnostic markers (criteria) in disorders of neuro-vegetative regulation of cardiac function in patients with dermatoses. Results. Peculiarities of the heart rhythm structure were found in patients with dermal diseases: a statistically significant decrease in the LF and HF components was revealed and an imbalance was found in the regulation of the autonomic nervous system with a predominance of sympathetic imbalance in patients with dermatoses living in the Middle Ob region in the Khanty-Mansi Autonomous Okrug - Ugra. Diagnostic indicators of the characteristics of HRV in patients with eczema and psoriasis were determined, which made it possible to distinguish a complex of signs in the differences in the autonomic regulation of heart rhythm - Total P (mc2), VLF (mc2), LF (mc2) and the integral characteristics of HRV - Baevsky stress index (INB (cu), indicators of the sympathetic and parasympathetic system (SIM, PAR, cu). Conclusions. Patients with chronic dermatoses (psoriasis, eczema) living in severe climatic conditions of the Middle Ob Region have a tendency to early development of complicated forms of the disease with detection of imbalance in the regulation of the autonomic nervous system with a predominance of parasympathetic tone. The data obtained are important diagnostic aspects of the diseases pathogenesis, contributing to the determination of the further prognosis and correction of medical treatment.

Комплексний підхід до діагностики та лікування патології вагітності у жінок з перинатальними втратами в анамнезі

The objective: improving the diagnosis and treatment of pregnancy pathology in women with a history of perinatal loss by implementing a comprehensive approach. Materials and methods. A prospective longitudinal controlled randomized trial was conducted with the participation of 105 women aged 27.9 ± 0.4 years, with gestation at the first examination of 28.5 ± 0.47 weeks with a history of perinatal loss. Two anthropological-demographic and gestational group comparisons were formed: the main group (57 women), in which, in addition to the standard protocol, the author’s integrated approach to diagnostics (using cardiointervalography) and treatment of pregnancy pathology (including therapy, including treatment) cardiointervalography), and a comparison group (48 women) with a standard treatment-diagnostic approach. The nature and scope of the survey are in accordance with industry standards. Results. As a result of the study, the best clinical parameters in the main group were determined, which included a lower frequency and severity of complications of pregnancy (premature delivery, anomalies of delivery, etc.). Conclusion. The prospect of further research is the development of a mathematical model for predicting the effectiveness of diagnosis and treatment of pregnancy pathology in women with a history of perinatal loss. Key words: pregnancy pathology, perinatal losses, cardiointervalography, obstetric history, neurovegetative regulation, fetal distress, treatment.

Periaqueductal gray and emotions: the complexity of the problem and the light at the end of the tunnel, the magnetic resonance imaging.

The periaqueductal gray (PAG) is less referred in relationship with emotions than other parts of the brain (e.g. cortex, thalamus, amygdala), most probably because of the difficulty to reach and manipulate this small and deeply lying structure. After defining how to evaluate emotions, we have reviewed the literature and summarized data of the PAG contribution to the feeling of emotions focusing on the behavioral and neurochemical considerations. In humans, emotions can be characterized by three main domains: the physiological changes, the communicative expressions, and the subjective experiences. In animals, the physiological changes can mainly be studied. Indeed, early studies have considered the PAG as an important center of the emotions-related autonomic and motoric processes. However, in vivo imaging have changed our view by highlighting the PAG as a significant player in emotions-related cognitive processes. The PAG lies on the crossroad of networks important in the regulation of emotions and therefore it should not be neglected. In vivo imaging represents a good tool for studying this structure in living organism and may reveal new information about its role beyond its importance in the neurovegetative regulation.

Особливості перебігу пологів у жінок з перинатальними втратами в анамнезі

The objective: was to determine the features of the course of labor in women with a history of perinatal lesions. Materials and methods. A prospective, concurrent, controlled, randomized study was conducted involving 68 women aged 26.8 ±0.5 years, with a gestation period of 28.1 ±0.56 weeks, 41 of whom had perinatal history lesions (main group) and comparable for anthropodemographic indicators and terms of gestation of 27 women with a repeat pregnancy without abortion or unsuccessful childbirth (child death) in the history (comparison group). Results. In the anamnestic aspect, the characteristics of pregnant women with a history of perinatal losses are a relatively shorter interval between repeated pregnancies, a more frequent development of extragenital pathology - the respiratory, nervous, endocrine, cardiovascular and orthopedic disorders, and a higher incidence of gynecological anamnesis. In the context of complications of delivery, women with perinatal losses are characterized by premature birth, anomalies of labor, early discharge of amniotic fluid, ruptures of soft tissues. Conclusion. It is necessary to make a comparative analysis of the course of pregnancy, childbirth and the state of health of newborns in women with a history of obstetrical anamnesis in connection with violations of neurovegetative regulation. Key words: perinatal losses, anamnesis, childbirth, current.

ПСИХОФИЗИОЛОГИЧЕСКИЕ ЗАКОНОМЕРНОСТИ АДАПТАЦИИ ПОДРОСТКОВ С ДИСФУНКЦИЕЙ ОПОРНО-ДВИГАТЕЛЬНОГО АППАРАТА (ПРОФЕССИОНАЛЬНО-ОБРАЗОВАТЕЛЬНЫЙ АСПЕКТ)

Aim. The fragmentary character of research on the psychophysiological aspects of the adaptation of adolescents with dysfunction of the locomotor system determines the necessity to investigate the patterns of the functioning of psycho-physiological and neurovegetative processes in adolescents with impaired posture depending on gender. Materials and Methods. We conducted the study of psychophysiological indicators and heart rhythm vegetative regulation among pupils (n = 368, aged 12–14) of different gender from educational institutions in Chelyabinsk. The main group consisted of children with the signs of impaired posture. The control group consisted of pupils belonging to 1st or 2nd health group. The diagnostics of psychophysiological characteristics of pupils comprised the study of the dynamics of nervous processes in the central nervous system using “NS-PsychoTest” computer appliance. The quality of the regulatory functions of neurovegetative provision was assessed with the help of “Polispectr-Rhythm” computer appliance (NeuroSoft, Russia). Results. The results of the psychophysiological testing of adolescents with postural dysfunction reveal the mobilization-compensatory mechanism of sensorimotor integration, which provides the high regulation and effectiveness of the locomotor action with reduced neuronal reactivity and weakness of the nervous system. The results of the factor analysis of the integral indicators of the dynamics of the nervous processes in the central nervous system, heart rhythm neurovegetative regulation, and the parameters of vegetative life support systems in the examined pupils revealed two options for the ensuring of body reactivity. The “Psychosomatic” variant of reactivity is manifested in adolescents without the pronounced symptoms of disturbances in the locomotor system; the “Somatoform” option is revealed in adolescents of both sexes with dysfunction of the locomotor system. Conclusion. The steady growth of pathology in the locomotor system of modern pupils determines the necessity of an integrative assessment of the health of students with disorders of the locomotor system. The adolescents with the signs of postural dysfunction show somatoform reactions being the manifestation of tension in the adaptation mechanisms of the neurovegetative regulation and providing the relative stability of neurodynamic processes and perfect movement and static muscular effort regulation in comparison with the control group. In adolescents from the control group, cognitive activity is mainly determined by the nervous retuning of systemic reactions.

ПСИХОФИЗИОЛОГИЧЕСКИЕ ЗАКОНОМЕРНОСТИ АДАПТАЦИИ ПОДРОСТКОВ С ДИСФУНКЦИЕЙ ОПОРНО-ДВИГАТЕЛЬНОГО АППАРАТА (ПРОФЕССИОНАЛЬНО-ОБРАЗОВАТЕЛЬНЫЙ АСПЕКТ)

Aim. The fragmentary character of research on the psychophysiological aspects of the adaptation of adolescents with dysfunction of the locomotor system determines the necessity to investigate the patterns of the functioning of psycho-physiological and neurovegetative processes in adolescents with impaired posture depending on gender. Materials and Methods. We conducted the study of psychophysiological indicators and heart rhythm vegetative regulation among pupils (n = 368, aged 12–14) of different gender from educational institutions in Chelyabinsk. The main group consisted of children with the signs of impaired posture. The control group consisted of pupils belonging to 1st or 2nd health group. The diagnostics of psychophysiological characteristics of pupils comprised the study of the dynamics of nervous processes in the central nervous system using “NS-PsychoTest” computer appliance. The quality of the regulatory functions of neurovegetative provision was assessed with the help of “Polispectr-Rhythm” computer appliance (NeuroSoft, Russia). Results. The results of the psychophysiological testing of adolescents with postural dysfunction reveal the mobilization-compensatory mechanism of sensorimotor integration, which provides the high regulation and effectiveness of the locomotor action with reduced neuronal reactivity and weakness of the nervous system. The results of the factor analysis of the integral indicators of the dynamics of the nervous processes in the central nervous system, heart rhythm neurovegetative regulation, and the parameters of vegetative life support systems in the examined pupils revealed two options for the ensuring of body reactivity. The “Psychosomatic” variant of reactivity is manifested in adolescents without the pronounced symptoms of disturbances in the locomotor system; the “Somatoform” option is revealed in adolescents of both sexes with dysfunction of the locomotor system. Conclusion. The steady growth of pathology in the locomotor system of modern pupils determines the necessity of an integrative assessment of the health of students with disorders of the locomotor system. The adolescents with the signs of postural dysfunction show somatoform reactions being the manifestation of tension in the adaptation mechanisms of the neurovegetative regulation and providing the relative stability of neurodynamic processes and perfect movement and static muscular effort regulation in comparison with the control group. In adolescents from the control group, cognitive activity is mainly determined by the nervous retuning of systemic reactions.

Оптимізація тактики ведення вагітних з перинатальними втратами в анамнезі

The objective: to improve the effectiveness of gestational complications prevention in women with a previous perinatal losses (PL) by diagnostic methods optimization. Patients and methods. 85 pregnant women with previous perinatal losses were examined. Group II (control group) included 89 pregnant women without PL. The relationship between neurovegetative violations and pregnancy complications in women with adverse obstetric history were found using the heart rate variability method and determination of mother–placenta–fetus system status. Results. The overbalance of the sympathetic effects, mostly in the third trimester, was observed in pregnant women with previous perinatal losses, unlike the control group (p<0,05). This may be explained due to depletion of compensatory reserves of autonomic nervous system. In the second trimester increased sympathetic tone was established after stress tests in women of the main group, probably, because of the compensatory-adaptive reactions of all parts of the autonomic nervous system realization. Conclusion. Vegetative homeostasis violations with increased sympathetic tone cause placental dysfunction with metabolic changes, fetal growth retardation and other gestational complications. The dominance of sympathetic tone in pregnant women with previous perinatal losses and hormonal function of mother–placenta–fetus system indicate an imbalance of neurohumoral regulation and can be the diagnostic and prognostic sign of pregnancy complications. Key words: neurovegetative regulation, perinatal losses, placental dysfunction, cardiointervalography.

Neurovegetative regulation and fatigue in bus drivers

Neurovegetative regulation and fatigue in bus drivers

Heart rate variability (HRV) analysis in radio and TV broadcasting stations workers

The aim of the study was to assess the mechanism of cardiovascular impairments in workers exposed to UHF-VHF radio frequency electromagnetic fields (EMF). Heart rate variability (HRV) was analysed using 512 normal heart beats registered at rest. The analysis concerned time-domain (STD R-R) and frequency-domain (VLF, LF, HF) parameters of HRV. Fifty nine workers (group I) with low-level and 12 workers (group II) with high-level exposure were examined. The mean age of the subjects was 47 ± 9 years and 41 ± 14 years, and mean exposure duration 19.1 ± 8.8 years and 13 ± 4 years, in groups I and II, respectively. The groups were divided according to: E(max), E(dose), E(mean) for frequencies UHF, VHF and UHF+VHF: The control group consisted of 42 non-exposed subjects, aged 49 ± 8 years. Statistical analysis comprised one-way analysis of variance, covariance analysis and logistic regression models. In the exposed groups, the heart rate was higher than in the control one. Standard deviation of R-R intervals (STD R-R) was found to be significantly (p = 0.0285) lower in group I (42.5 ± 24.7 ms) compared to the control group (62.9 ± 53.5 ms). The risk of lowered STD R-R was significantly increased (OR = 2.37, p = 0.023) in group II. Both exposed groups presented significantly higher VLF and LF values than the control group (p = 0.005 and p = 0.0025, respectively). The EMF-exposed groups were characterised by the dominance of the sympathetic system (LF/HF 1.3 ± 0.35). The results indicate that exposure to radiofrequency EMF may affect the neurovegetative regulation.

The influence of smoking on neurovegetative regulation of the cardiorespiratory system in healthy people and in patients with bronchial asthma

Summary. Neurovegetative regulation of the cardiorespiratory system was studied in 229 participants (83 healthy persons and 146 patients with bronchial asthma) using the synchronous analysis of heart rhythm and systolic and diastolic blood pressure variability. All participants were divided into groups depending on smoking status. The groups differed in parameters of neurovegetative regulation. More prominent neurovegetative regulatory disorders were found in smokers. Formation of strongly determined regulatory system was shown in patients with bronchial asthma. Smoking led to early quantitative and qualitative remodeling of the regulatory system.

Effect of superficial reflexotherapy (redox-therapy) on the psychophysiological status of athletes

The objective of this study was to evaluate the influence of superficial reflexotherapy (redox-therapy) on the psychophysiological status of athletes. It was shown to have positive effect on central and peripheral hemodynamics and beneficial action on neurovegetative regulation of the blood circulatory system. These effects depend on the choice of applicators and the duration of therapy. Superficial reflexotherapy can be used alone or in combination with physiotherapy.

The loss of entropy circadian rhythm in sinusal R-R intervals of type 1 diabetic pregnant women suggests an indeterministic chaos in cardiac pacing (minimum delirium cordis syndrome). A newly identifiable type of silent cardiac dysautonomia?

Objective — The scope of this study is to detect whether or not the entropy (E) circadian rhythm (CR) is maintained preserved in sinusal R-R intervals (SRRI), its loss being the expression of a transition to an indeterministic chaos in heart rate variability (HRV).Methods — The E of SRRI was estimated in 14 type 1 diabetic pregnant women (DPW) in the first trimester of an apparently uncomplicated gestation (7 patients - mean age = 30.3 ± 4.1 y - without clinical and laboratory evidence of cardiac autonomic neuropathy, and 7 patients - mean age = 30.7 ± 3.6 y - with positive tests for a cardiac dysautonomia).The E CR was studied via the single cosi-nor method, and summarized via the population-mean cosinor method.Results — The E CR was found not to be preserved in both the investigated type 1 DPW, despite the occurrence of the SRRI CR.Conclusions — The loss of the E CR confirms that in type 1 DPW there is a transition to an indeterministic disorder in HRV due to the lack of an autocorrelated periodic chaos in cardiac pacing. Such an unphysiological neurovegetative regulation suggests a new silent cardiac dysautonomic syndrome, that we intend to call “minimum delirium cordis syndrome” (MDCS). Can the MDCS be regarded as a condition of cardiovascular risk? To answer this question, it seems justified to suggest that the study of the E CR should be added to the routine tests that are presently applied to clinical analysis of the Holter ECG, being the classic tests of linear analysis not methodologically suitable for detecting the indeterministic chaos of the MDCS.

EVALUATION OF PECULIARITIES OF SPINAL BLOOD CIRCULATION, SPINAL ARACHNOID MICROCIRCULATION AND NEUROVEGETATIVE REGULATIONS IN SCOLIOSIS

Objective. To study aorta topography, spinal cord blood circulation, and spinal arachnoid microcirculation, as well as to evaluate thermographically microcirculation in soft tissues of the back and peculiarities of its neurovegetative regulation in scoliotic spine deformity. Material and Methods. Seventy four angiographies have been performed in 69 patients with scoliosis. In 21 patients laser doppler flowmetry was used intraoperatively to study spinal arachnoid microcirculation in red and infrared spectra before and after deformity correction. In 26 patients microcirculation and trophism of soft tissues of the back was studied in pre- and postoperative period. Results. Angiographic data show that in severe and extremely severe scoliosis the shape of aorta, but not its diameter, is changed. Examination of patients with secondary kyphoscoliosis showed a system of posterior arteries that was not visualized in patients with dysplastic scoliosis. Study of microcirculation in spinal arachnoid revealed that correction of relatively light scoliosis with CDI system improved the indices of microcirculation. In extremely severe scoliosis there is a tendency towards blood circulation disturbance in deeper layers of the arachnoid. Normalization of vegetative segmental regulation takes place in 2/3 of patients within a postoperative period. Conclusion. Spinal blood supply system in patients with scoliosis is a self-regulating mechanism of hemodynamic interactions, the compensation degree of which depends on localization of afferent spinal arteries, deformation of vertebral canal and permeability of anterior spinal artery system.

Neurovegetative Disturbances in Workers Exposed to 50 Hz Electromagnetic Fields

Since the circulatory and nervous systems are composed of electrically excitable tissues, it is plausible that they can be stimulated by electromagnetic fields (EMF). No clinical studies have as yet been carried out to explain whether and how occupational exposure to 50 Hz EMF can influence the neurovegetative regulation of the cardiovascular function. The present project was undertaken to assess the autonomic function in workers occupationally exposed to 50 Hz EMF, by analyzing the heart rate variability. The study group comprised 63 workers of switchyard substations, aged 22-67 years (39.2 +/- 10.0 years), and the control group 42 workers of radio link stations, aged 20-68 years (40.7 +/- 9.2 years), employed at workposts free from EMF exposure. The age range and employment duration in both groups did not differ significantly. To assess the neurovegetative regulation of the cardiac function, heart rate variability (HRV) analysis was made based on 512 normal heart beats recorded at rest. The analysis, performed using fast Fourier transformation, concerned the time- and frequency-domain HRV parameters. Power spectrum in the very low (VLF), low (LF) and high (HF) frequency bands was determined. The relative risk of decreased HRV (STD R-R < 27 ms), calculated with use of a logistic regression model, was significantly higher in the exposed group than in controls (OR = 2.8). The VLF power spectrum was significantly higher in the exposed group and correlated with the exposure level. The percentage of subjects with dominant sympathetic function (LF/HF > 1) was significantly higher in the study group than in controls (65% vs. 47%). It was concluded that occupational exposure to 50 Hz EMF could influence the neurovegetative regulation of the cardiovascular system.