scholarly journals Descriptive epidemiology of high frequency component based on heart rate variability from 10-second ECG data and daily physical activity among community adult residents: the Nagahama Study

2020 ◽  
Vol 14 (4) ◽  
pp. 241-247
Author(s):  
Naomi Takahashi ◽  
Yoshimitsu Takahashi ◽  
Yasuharu Tabara ◽  
Takahisa Kawaguchi ◽  
Akira Kuriyama ◽  
...  
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Frequency Component ◽  
Daily Physical Activity ◽  
High Frequency Component ◽  
Descriptive Epidemiology ◽  
Community Adult ◽  
Ecg Data

scholarly journals The State of the Cardiovascular System of Qualified Table Tennis Athletes at the Stage of Competitive Activity

2021 ◽  
Vol 6 (4) ◽  
pp. 231-236
Author(s):  
Ulizko V. M. ◽  
◽  
V. R. Kryzhanivsky ◽  
T. M. Zakharkevich ◽  
I. L. Belyavsky
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Cardiovascular System ◽  
High Frequency ◽  
Heart Rhythm ◽  
Frequency Component ◽  
The State ◽  
Autonomic Regulation ◽  
The Body ◽  
High Frequency Component

The condition of the cardiovascular system is one of the important criteria for assessing the impact of sports training on the human body. According to the indicators characterizing the state of the cardiovascular system, it is possible to trace the changes associated with fluctuations in the level of training, as well as to identify signs of overload as early as possible. The study of adaptive reactions of the cardiovascular system in athletes under physical activity is an important indicator for sports practice. The purpose of the study was to investigate the quantitative criteria for assessing the state of the cardiovascular system and approaches to correct the functional state of qualified athletes specializing in table tennis. Materials and methods. Studies of heart rate variability, quantitative and qualitative indicators that sufficiently reflect the autonomic functions of the body were used in order to assess the state of autonomic regulation in highly qualified athletes. Systematic physical activity causes a significant restructuring of the cardiovascular system and leads to morphofunctional changes in the mechanisms of the heart. Depending on the autonomic regulation of heart rhythm, there are different ways of myocardial adaptation processes. The balance of sympathetic and parasympathetic links of autonomic rhythm regulation is reflected in the activation of the left ventricle. Results and discussion. Adaptive changes of the cardiovascular system to competitive and training loads in the competitive period in qualified athletes are characterized by a significant decrease in heart rate (from 84.75±1.74 beats / min to 74.8±0.38 beats / min). In addition, a significantly faster process of restoring heart rate was established after exercise in the group of qualified athletes, compared with athletes of the category 1 at 4 (p >0.05) and 5 (p >0.05) minutes, respectively. According to the indicators of autonomic regulation of heart rhythm, activation of the parasympathetic link prevails in athletes of the category 1 in comparison with qualified athletes activation (according to high-frequency component, p <0.05). Significantly higher rates of individual parts of the body compared to low-skilled athletes were found out: the hormonal system (the indicator responsible for the hormonal part of the body – very low-frequency component) and the nervous system (indicators of the sympathetic nervous system – low frequency component). There are significantly higher values of the magnitude of the heart rate spectrum and high-frequency component at p <0.05, which indicates a higher power of all units of the parasympathetic regulation in the category 1 in relation to masters of sports and candidates masters of sports. Conclusion. Systematic physical activity causes a significant restructuring of the cardiovascular system and leads to morphofunctional changes in the mechanisms of the heart. Depending on the autonomic regulation of heart rhythm, there are different ways of myocardial adaptation processes. The balance of sympathetic and parasympathetic links of autonomic rhythm regulation is reflected in the activation of the left ventricle. The analysis showed that the spectral characteristics of heart rate variability significantly differ between groups of athletes with different dominance that are observed only in terms of high-frequency component, which in turn led to a change in the sympathetic-vagal balance

scholarly journals Heart Rate Variability Using The Analgesia Nociception Index as A Predictor of Illness Severity and Mortality in Critically Ill Patients with COVID-19.

2020 ◽  
Author(s):  
Cristian Aragón-Benedí ◽  
Pablo Oliver-Forniés ◽  
Felice Galluccio ◽  
Ece Yamak Altinpulluk ◽  
Tolga Ergonenc ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
High Frequency ◽  
Frequency Component ◽  
High Frequency Component ◽  
Autonomic Nervous

Abstract Introduction A balance between the autonomic nervous system and the immune system against SARS-COV-2 is critical in the resolution of its severe macrophage proinflammatory activation. To demonstrate that most severely ill COVID-19 patients will show a depletion of the sympathetic nervous system and a predominance of parasympathetic tone. We hypothesized that a low energy of an autonomic nervous system and a high level of the high frequency component of heart rate variability may be related to the number of proinflammatory cytokines and could have a predictive value in terms of severity and mortality in critically ill patients suffering from COVID-19; Materials and Methods Single-centre, prospective, observational pilot study which included COVID-19 patients admitted to the Surgical Intensive Care Unit. High frequency (HF) component of heart rate variability (HRV) and energy of the autonomic nervous system were recorded using analgesia nociception index monitor (ANI). To estimate the severity and mortality we used the SOFA score and the date of discharge or date of death.Results A total of fourteen patients were finally included in the study. High-frequency component of heart rate variability (ANIm) were higher in the non-survivor group (p = 0.003) and were correlated with higher IL-6 levels (p = 0.002) Energy was inversely correlated with SOFA (p = 0.029). Limit value at 80 of ANIm, predicted mortalities with the sensitivity of 100% and specificity of 85.7%. In the case of energy, a limit value of 0.41 predicted mortality with all predictive values of 71.4%.Conclusion The different components of the spectral analysis of HRV allow us to infer the association between the autonomic nervous system and critically ill patients’ immune system. A low autonomic nervous system activity and a predominance of the parasympathetic system due to sympathetic depletion in patients are associated with a worse prognosis and higher mortality.

Psycho-Vegetative Status and Plasma Catecholamines in the Men with Acute Coronary Syndrome

10.12737/5922 ◽  
2014 ◽  
Vol 21 (3) ◽  
pp. 146-149
Author(s):  
Алексеев ◽  
D. Alekseev ◽  
Лиман ◽  
T. Liman ◽  
Виноградов ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Acute Coronary Syndrome ◽  
High Frequency ◽  
Depressive Disorders ◽  
Frequency Component ◽  
High Frequency Component ◽  
Coronary Syndrome ◽  
Fatal Myocardial Infarction

The authors analyzed the manifestations of anxiety and depressive disorders, disturbance of autonomic regulation and changes in the level of catecholamines in the blood of patients with acute coronary syndrome from the perspective of outcomes of the disease. 102 men with a diagnosis of acute coronary syndrome were examined. Blood samples for the determination of catecholamines (epinephrine, norepinephrine, dopamine) was performed at admission, psychological examination and scrutiny of heart rate variability was performed on the third-fourth day of the hospitalization. All patients were divided into three groups. The first group was executed on 14 (13,7%) patients who had fatal myocardial infarction developed during hospitalization. In the second group there were 40 (47,1%) patients with non-fatal myocardial infarction. The third group included 48 (47,1%) patients with unstable angina. It was shown, that levels of anxiety and depression were inverse correlated with the concentration of dopamine in the plasma, and adrenaline levels are positively correlated with indicators of overall heart rate variability and its high frequency component. Thus, in patients with acute coronary syndrome, who developed myocardial infarction the incidence and severity of anxiety and depressive disorders is substantially lower than in patients with unstable angina. Increase in high frequency component of heart rate variability was more typical for patients with acute coronary syndrome who developed fatal myocardial infarction during hospitalization. High levels of dopamine in the blood plasma are typical for patients with nonfatal myocardial infarction.

Effects of 2-Hz and 100-Hz Electroacupuncture Stimulation on Respiratory Function and Heart Rate Variability: A Randomized Crossover Study

2021 ◽  
Author(s):  
Kazufumi Takahashi ◽  
Xiaoming Wang ◽  
Daiyu Shginohara ◽  
Kenji Imai
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Respiratory Function ◽  
Low Frequency ◽  
Frequency Component ◽  
Autonomic Nerve ◽  
High Frequency Component ◽  
Respiratory Function Test ◽  
Function Test

Background: Bronchial contraction and dilation is thought to be caused by non-adrenergic non-cholinergic nerves. Objective: To investigate the effects of low-frequency (1-5 Hz) and high frequency (50-100 Hz) electric acupuncture (EA) stimulation on bronchial dilation. Design: Prospective, single-center study. Setting: Teikyo Heisei University Subjects: Seventeen healthy male adults Randomization: We randomly assigned subjects to 2-Hz EA and 100-Hz EA groups in a crossover trial. The washout period was 2 weeks. Intervention: Both groups underwent a respiratory function test, followed by a 5-minute rest, followed a 5-minute rest or EA stimulation, followed by a 5- min rest. Heart rate variability was measured at rest, followed by another respiratory function test. Acupuncture was delivered near the cervical ganglia at the level of the sixth cervical vertebra on the left side. EA stimuli were set to 2-Hz or 100-Hz, and stimulation intensity was set to a level where no pain was felt. Main outcome measures: Spirometry (forced vital capacity, forced expiratory volume in 1 s, and maximum respiratory flow), autonomic nerve activity (low-frequency component, high-frequency component, and their ratio), and heart rate variability. Results: Heart rate variability analysis showed significant differences in heart rate between the 2-Hz EA and 100-Hz EA groups. The 2-Hz EA group showed a significant increase in HF. Conclusions: 2-Hz EA stimulation resulted in decreased heart rate and increased HF during stimulation. This may be more effective for regulation of the autonomic nerves of the cardiopulmonary system than 100-Hz EA stimulation. Future studies are required to confirm our findings.

scholarly journals DYNAMICS OF HEART RATE VARIABILITY UNDER THE INFLUENCE OF COURSE YOGA BREATHING EXERCISES ON HEALTHY YOUNG PEOPLE

2019 ◽  
Vol 72 (4) ◽  
pp. 613-616 ◽  
Author(s):  
Nataliia I. Sheiko ◽  
Volodymyr P. Feketa
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Cardiac Rhythm ◽  
Low Frequency ◽  
Frequency Component ◽  
High Frequency Component ◽  
Regulatory Activity ◽  
Biological Feedback ◽  
Very Low Frequency

Introduction: Heart rate variability is a highly informative non-invasive method of research not only for the functional state of the cardiovascular system and also for the integrative regulatory activity of the autonomic nervous system. The positive effect of diaphragmatic breathing is positive in the mode of biological feedback using portable devices, but there is little evidence of the use of yoga breathing gymnastics in order to influence the heart rate variability. The aim: To compare the possibilities of using courses of breathing gymnastics of yogis and diaphragmatic breathing sessions in the mode of biological feedback using a portable device. Materials and methods: The study involved 70 practically healthy foreigners, who were divided into 2 groups of 35 people. Participants of the 1st group daily engage in respiratory exercises pranayama for 15 minutes in 1 month. Participants in the 2nd group used the MyCalmBeat portable device. Heart rate variability was registered by using the computer diagnostic complex “CardioLab” (“KhAI-Medika”, Ukraine). Results: In both groups there was similar dynamics of heart rate variability indices, but its severity was different. The common integral effect was a significant growth of heart rate variability both according to statistical and spectral indicators – total power increased, as well as high-frequency component. The power of the very-low frequency waves has probably decreased only in the group with the device. In the percentage structure of the cardiac rhythm spectrum, the specific weight of very-low frequency component and the percentage of high-frequency component increased. Conclusions: Respiratory gymnastics yoga for 15 minutes daily contributes to the growth of heart rate variability through the suppression of the central link (very-low frequency component) of regulation of cardiac rhythm and increased activity of parasympathetic influences (high-frequency component), as well as the redistribution of regulatory activity of the central nervous system between the central and peripheral links of regulation of the cardiac rhythm in favor of the latter.

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