scholarly journals PECULIARITIES OF HEART RATE VARIABILITY IN NEWBORNS

2018 ◽  
Vol 63 (4) ◽  
pp. 52-57 ◽  
Author(s):  
O. S. Panina ◽  
A. R. Kiselev ◽  
E. I. Borovkova ◽  
Yu. V. Chernenkov ◽  
V. V. Skazkina ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Cardiovascular System ◽  
Low Frequency ◽  
Heart Rhythm ◽  
Regulatory Elements ◽  
Healthy Adults ◽  
Low Frequency Oscillations ◽  
Vegetative Regulation ◽  
Synchronous Recording

Heart rate variability values are potentially important for assessing vegetative dysfunction in children.The purpose of the research: a comparative study of spectral heart rate variability parameters and synchronization of low-frequency oscillations, characterizing baroreflex in the vegetative regulation of the cardiovascular system in healthy newborns and adults.15 healthy newborns and 60 healthy individuals in the age of 18-34 years old were included in the study. We performed synchronous recording of electrocardiograms and photoplethysmograms with 10 minutes duration, at rest. Were evaluated spectral heart rate variability indices and the index of synchronization of low-frequency oscillations in heart rate variability and photoplethysmograms (S index).Results. In newborns, the peak of low-frequency oscillations was predominantly in the range 0.07–0.09 Hz, and high frequency 0.40–0.50 Hz. Newborns had lower LF% values than adults: 22.8 (14.1, 29.4) vs 32.9 (25.1, 41.9) (p=0.009). The S index in newborns was 20.1 (16.9, 26.5)%, and 33.2 (21.2, 45.4)% in healthy adults (p=0.023).Conclusion. We have first demonstrated that the interaction of baroreflex regulation of heart rhythm and peripheral blood filling in healthy newborns is characterized by lower values of S index, than in healthy adults, which can be explained by the immaturity of the vegetative regulatory elements of the cardiovascular system. 

scholarly journals Variability of heart rhythm and features of psychological status in young hockey players

2015 ◽  
Vol 96 (4) ◽  
pp. 675-679
Author(s):  
L V Yakovleva ◽  
G N Shangareeva
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Low Frequency ◽  
Heart Rhythm ◽  
Psychological Status ◽  
Total Power ◽  
Hockey Players ◽  
Regulation Type ◽  
Vegetative Regulation ◽  
Low Frequency Waves

Aim. To study the heart rate variability and characteristics of psychological status in young hockey players in professional sports. Methods. 65 young hockey players of «Salavat Yulaev» children’s youth sports school of Olympic reserve were examined. The mean age was 14.7±0.5 years, sports experience - 8.75±1.5 years. Determination of the vegetative regulation type and spectral analysis of heart rate variability was performed on a hardware-software «Polispektr-8» complex manufactured by «Neurosoft». Vegetative regulation state was determined by the vagosympathetic balance ratio (LF/HF). The following parameters of heart rate variability were measured: TP (total power of spectrum), HF (high-frequency waves power), LF (low-frequency waves power), VLF (very low frequency waves power), heart rate was calculated. A questionnaire survey was performed using five-factor personality questionnaire known as the «Big Five». Results. Parasympathetic type of vegetative tone regulation was identified in 30 (46.1%) of young hockey players, balanced initial vegetative tone - in 28 (43.1%) patients, sympathetic type - in 7 (10.8%) patients. Changing of the vegetative regulation type in athletes with sympathetic regulation demonstrates a shift in autonomic balance towards the predominance of sympathetic influence, which is non-physiological for athletes. Such a state of maladjustment can lead to overwork, overstrain, significant reduction in work efficiency and later - to the development of diseases and injuries. According to psychological testing signs of mental and emotional stress and adaptive processes strain were revealed. Conclusion. The results of the study allow to reasonably implement a differentiated approach to psychological support of the training process taking in account the functioning of the autonomic nervous system.

Characteristics of heart rate variability in patients with acute coronary syndrome without ST segment elevation in comparison with clinical and biochemical parameters

2021 ◽  
Vol 29 (3) ◽  
pp. 369-378
Author(s):  
Aleksej A. Nizov ◽  
Aleksej I. Girivenko ◽  
Mihail M. Lapkin ◽  
Aleksej V. Borozdin ◽  
Yana A. Belenikina ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Acute Coronary Syndrome ◽  
Creatine Phosphokinase ◽  
Spectral Power ◽  
Low Frequency ◽  
Heart Rhythm ◽  
St Segment Elevation ◽  
Coronary Syndrome ◽  
St Segment

BACKGROUND: The search for rational methods of primary, secondary, and tertiary prevention of coronary heart disease. To date, there are several publications on heart rate variability in ischemic heart disease. AIM: To study the state of the regulatory systems in the organism of patients with acute coronary syndrome without ST segment elevation based on the heart rhythm, and their relationship with the clinical, biochemical and instrumental parameters of the disease. MATERIALS AND METHODS: The open comparative study included 76 patients (62 men, 14 women) of mean age, 61.0 0.9 years, who were admitted to the Emergency Cardiology Department diagnosed of acute coronary syndrome without ST segment elevation. On admission, cardiointervalometry was performed using Varicard 2.51 apparatus, and a number of clinical and biochemical parameters were evaluated RESULTS: Multiple correlations of parameters of heart rate variability and clinical, biochemical and instrumental parameters were observed. From this, a cluster analysis of cardiointervalometry was performed, thereby stratifying patients into five clusters. Two extreme variants of dysregulation of the heart rhythm correlated with instrumental and laboratory parameters. A marked increase in the activity of the subcortical nerve centers (maximal increase of the spectral power in the very low frequency range with the underlying reduction of SDNN) in cluster 1 was associated with reduction of the left ventricular ejection fraction: cluster 147.0 [40.0; 49.0], cluster 260.0 [58.0; 64.0], cluster 360.0 [52.5; 64.5] % (the data are presented in the form of median and interquartile range; Me [Q25; Q75], p 0,05). Cluster 5 showed significant reduction in SDNN (monotonous rhythm), combined with increased level of creatine phosphokinase (CPC): cluster 5446,0 [186.0; 782.0], cluster 4141.0 [98.0; 204.0] IU/l; Me [Q25; Q75], p 0.05) and MВ-fraction of creatine phosphokinase; cluster 532.0 [15.0; 45.0], 4 cluster 412.0 [9.0; 18.0] IU/l; Me [Q25; Q75], p 0.05). CONCLUSIONS: In patients with acute coronary syndrome without ST segment elevation, cluster analysis of parameters of heart rate variability identified different peculiarities of regulation of the heart rhythm. Pronounced strain of the regulatory systems of the body was found to be associated with signs of severe pathology: the predominance of VLF (spectral power of the curve enveloping a dynamic range of cardiointervals in the very low frequency range) in spectral analysis with an underlying reduced SDNN is characteristic of patients with a reduced ejection fraction, and a monotonous rhythm is characteristic of patients with an increased level of creatine phosphokinase and MB-fraction of creatine phosphokinase.

scholarly journals HEART RATE VARIABILITY AS THE ADAPTATION RESERVE INDICATOR OF CARDIOVASCULAR SYSTEM

2014 ◽  
Vol 8 (4) ◽  
pp. 4-8
Author(s):  
Aksana Kotava ◽  
Vasily Senko ◽  
Ruslan Shishko
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Cardiovascular System ◽  
Stress Test ◽  
Sharp Decrease ◽  
Study Groups ◽  
Vegetative Regulation ◽  
Severity Of The Disease ◽  
Stochastic Loads

Background: The efectiveness of the vegetative regulation action might be controlled by the method of heart rate variability (HRV), which has been very popularly used over the last 10 years worldwide. The analysis of many clinical studies indicates that the severity of the disease might be controlled using the method of HRV.Material and methods: All the experimental and controlled group participants, which consisted of healthy students with none sports experience, underwent the examination according to the 5-minute standard protocol of HRV. In addition, all the examinees performed a bicycle stress test. After the bicycle stress test, some additional tests of HRV were also carried out.Results: It was found that some signifcant diferences, between the group of sportsmen and the group of patients, exist. The parasympathetic activity of LF is maximum in athletes and tends to decrease in patients with cardiovascular pathologies. The decreases of the activity of the vasomotor centre was noticed in both study groups. The sympathetic system activity was the lowest in athletes.Conclusions: At the high depression of the vegetative regulation, any signifcant load (physical or psycho-emotional) indicates cardiovascular instability which remains beyond the capacity of adaptation. The higher the variability, the more stable the CVS is to the external loads. A sharp decrease of the variability, such as the heart vegetative innervations, causes deteriorating quality of the regulatory mechanisms and, as a result, the risk of cardiovascular diseases increases.Keywords: heart rate variability, deterministic and stochastic loads, cardiovascular system

Low Frequency Oscillations of Heart Rate Variability and Central Volume

2015 ◽  
Vol 192 ◽  
pp. 78-79
Author(s):  
M. Ferrario ◽  
U. Moissl ◽  
F. Garzotto ◽  
D.N. Cruz ◽  
C. Tetta ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Low Frequency ◽  
Low Frequency Oscillations ◽  
Central Volume

scholarly journals Method of estimation of synchronization strength between low-frequency oscillations in heart rate variability and photoplethysmographic waveform variability

2016 ◽  
Vol 5 (1) ◽  
pp. e0101 ◽  
Author(s):  
Anton R. Kiselev ◽  
Anatoly S. Karavaev ◽  
Vladimir I. Gridnev ◽  
Mikhail D. Prokhorov ◽  
Vladimir I. Ponomarenko ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Low Frequency ◽  
Low Frequency Oscillations

scholarly journals Arrhythmias in Patients after Surgical Myocardial Revascularization

2020 ◽  
Vol 16 (1) ◽  
pp. 133-138
Author(s):  
N. U. Zakirov ◽  
A. G. Kevorkov ◽  
A. S. Rasulov ◽  
E. Y. Tursunov
Keyword(s):  
Myocardial Infarction ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Cardiac Death ◽  
Ventricular Arrhythmias ◽  
Myocardial Revascularization ◽  
Heart Rhythm ◽  
Non Invasive ◽  
Life Threatening ◽  
Vegetative Regulation

This work represents literature review data regarding the study of the effect of surgical myocardial revascularization on the processes of electrical myocardial instability underlying the onset of life-threatening ventricular arrhythmias, as well as the possibilities for its non-invasive assessment by studying the heart rhythm variability and turbulence. Analyzed data demonstrated that, relying only on the presence of a viable myocardium, it is often impossible to predict the positive effect of revascularization on the prognosis in patients, especially those with reduced myocardial contractility. Considering the well-studied relationship between myocardial remodeling and neurohormonal activation, such non-invasive methods for assessing vegetative regulation of cardiac activity, as heart rate variability and turbulence may provide additional diagnostic information. The literature data indicate that heart failure, ventricular arrhythmias and recurrences of angina and myocardial infarction are the main problems that determine an unfavorable outcome in the postoperative period. There is important evidence that violations of the vegetative regulation of the heart, the heterogeneity of repolarization processes in the myocardium are integral indicators of the morphofunctional changes occurring in the process of coronary heart disease (CHD) progression. The role of indicators of heart rate variability and turbulence as predictors of sudden cardiac death was proved, mainly due to fatal ventricular heart rhythm disorders and cardiovascular mortality. Along with this, changes in these indicators, and their prognostic role in patients with CHD in revascularization are the subject of discussion, which determines the relevance of further studies on the effect of various methods of revascularization on the electrical instability of the myocardium, as one of the most important factors in the development of life-threatening ventricular arrhythmias that are predictors of sudden cardiac death, especially in patients who previously had acute myocardial infarction. Besides it is important to study the effect of myocardial revascularization on the indicators of cardiac autonomic regulation and the possibility of their use as prognostic criteria before and after surgery.

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