scholarly journals Autonomic Nervous System Responses to Whole-Body Vibration and Mental Workload: A Pilot Study

2019 ◽  
Vol 10 (4) ◽  
pp. 174-184
Author(s):  
Hamed Jalilian ◽  
Zahra Zamanian ◽  
Omid Gorjizadeh ◽  
Shahrzad Riaei ◽  
Mohammad Reza Monazzam ◽  
...  
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
High Frequency ◽  
Mental Workload ◽  
Low Frequency ◽  
Frequency Component ◽  
Whole Body ◽  
Autonomic Nervous ◽  
Rr Interval ◽  
The Mean

Background: Whole-body vibration (WBV) and mental workload (MWL) are common stressors among drivers who attempt to control numerous variables while driving a car, bus, or train. Objective: To examine the individual and combined effects of the WBV and MWL on the autonomic nervous system. Methods: ECG of 24 healthy male students was recorded using NeXus-4 while performing two difficulty levels of a computerized dual task and when they were exposing to WBV (intensity 0.5 m/s2; frequency 3–20 Hz). Each condition was examined for 5 min individually and combined. Inter-beat intervals were extracted from ECG records. The time-domain and frequency-domain heart rate variability parameters were then extracted from the inter-beat intervals data. Results: A significant (p=0.008) increase was observed in the mean RR interval while the participants were exposed to WBV; there was a significant (p=0.02) reduction in the mean RR interval while the participants were performing the MWL. WBV (p=0.02) and MWL significantly (p<0.001) increased the standard deviation of normal-to-normal intervals with a moderate-to-large effect size. All active periods increased the low-frequency component and low-frequency/high-frequency ratio. However, only the WBV significantly increased the highfrequency component. A significant (p=0.01) interaction was observed between the WBV and MWL on low-frequency component and low-frequency/high-frequency ratio. Conclusion: Exposure to WBV and MWL can dysregulate the autonomic nervous system. WBV stimulates both sympathetic and parasympathetic nervous system; MWL largely affects sympathetic nervous system. Both variables imbalance the sympatho-vagal control as well.

Baseline heart rate variability in healthy centenarians: differences compared with aged subjects (>75 years old)

1999 ◽  
Vol 97 (5) ◽  
pp. 579-584 ◽  
Author(s):  
Giuseppe PAOLISSO ◽  
Daniela MANZELLA ◽  
Michelangela BARBIERI ◽  
Maria Rosaria RIZZO ◽  
Antonio GAMBARDELLA ◽  
...  
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
High Frequency ◽  
Low Frequency ◽  
Frequency Component ◽  
Cardiac Autonomic Nervous System ◽  
Autonomic Nervous ◽  
Nervous System Activity ◽  
Aged Subjects ◽  
Normalized Units

Healthy centenarians have better anthropometric, endocrine, metabolic and immunological parameters than aged subjects (> 75 years old). Heart rate variability (HRV) has been demonstrated to be a good index of the cardiac autonomic nervous system. It is not known whether there are any differences in cardiac autonomic nervous system activity between aged subjects and healthy centenarians. It is possible that differences in cardiac autonomic nervous system activity could represent one of a cluster of factors explaining the extreme survival of centenarians. Thus we aimed to answer the following question: is there any difference in baseline HRV parameters between aged subjects and healthy centenarians? Therefore power spectral analysis of HRV at baseline was investigated in 25 aged subjects (age ⩾ 75 years) and 30 healthy centenarians (age ⩾ 100 years). Anthropometric measurements were made in all subjects, fasting blood samples were drawn for metabolite determinations, and HRV was determined. Independent of age, gender, body mass index and fasting plasma noradrenaline and free 3,3′,5-tri-iodothyronine concentrations, healthy centenarians had lower basal values for total power (1318±546 compared with 1918±818 ms2; P< 0.01) and the low-frequency component (33±21 compared with 50±11 normalized units; P< 0.03) and a higher value for the high-frequency component (77±15 compared with 61±18 normalized units; P< 0.05) than aged subjects. Consequently, the low-frequency/high-frequency ratio (0.43±0.07 compared with 0.91±0.05; P< 0.02) was also lower in the healthy centenarians than in the aged subjects. Our study demonstrates that the basal low-frequency/high-frequency ratio, an indirect index of cardiac sympathovagal balance, is lower in healthy centenarians than in aged subjects.

scholarly journals Analysis of heart rate variability in corn snakes (Pantherophis guttatus)

2021 ◽  
Vol 10 (11) ◽  
pp. e294101119781
Author(s):  
Antonio Gomes da Silva Neto ◽  
Daniel Souza Ferreira Magalhães ◽  
Raduan Hage ◽  
Laurita dos Santos ◽  
José Carlos Cogo
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Low Frequency ◽  
Autonomic Nervous ◽  
Rr Interval ◽  
Diagnosis And Prognosis ◽  
Frequency Domains ◽  
The Time Domain

The assessment of heart rate variability (HRV) by linear methods in conjunction with Poincaré plots can be useful for evaluating cardiac regulation by the autonomic nervous system and for the diagnosis and prognosis of heart disease in snakes. In this report, we describe an analysis of HRV in conscious adult corn snakes Pantherophis guttatus (P. guttatus).  The electrocardiogram (ECG) parameters were determined in adult corn snakes (8 females, 13 males) and used for HRV analysis, and the RR interval was analyzed by linear methods in the time and frequency domains. There was no sex-related difference in heart rate. However, significant differences were seen in the duration of the P, PR, and T waves and QRS complex; there was no difference in the QT interval. The values for the RR interval varied by 15.3% and 18.8% in male and female snakes, respectively, and there was considerable variation in the values for the high and low frequency domains. The changes in the time domain were attributed to regulation by the parasympathetic branch of the autonomic nervous system, in agreement with variations in the high and low frequency domains. The values for standard deviations 1 and 2 in Poincaré plots, as well as the values of the frequency domain, provide useful parameters for future studies of cardiac function in P. guttatus.

scholarly journals Autonomic Nervous System Function in Infants With Transposition of the Great Arteries

2011 ◽  
Vol 14 (3) ◽  
pp. 257-268 ◽  
Author(s):  
Tondi M. Harrison ◽  
Roger L. Brown
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
High Frequency ◽  
Heart Defects ◽  
Newborn Infants ◽  
Low Frequency ◽  
Autonomic Nervous ◽  
Healthy Infants ◽  
Before And After ◽  
High Risk Infants

The ability to maintain and respond to challenges to homeostasis is primarily a function of the autonomic nervous system (ANS). In infants with complex congenital heart defects this ability may be impaired. This study described change in ANS function before and after surgical correction in infants with transposition of the great arteries (TGA) and in healthy infants. A total of 15 newborn infants with TGA were matched with 16 healthy infants on age, gender, and feeding type. The ANS function was measured using heart rate variability (HRV). Data were collected preoperatively in the 1st week of life and postoperatively before, during, and after feeding at 2 weeks and 2 months of age. Infants with TGA demonstrated significantly lower high-frequency and low-frequency HRV preoperatively ( p < .001) when compared with healthy infants. At 2 weeks, infants with TGA were less likely than healthy infants to demonstrate adaptive changes in high-frequency HRV during feeding (Wald Z = 2.002, p = .045), and at 2 months, 40% of TGA infants exhibited delayed postfeeding recovery. Further research is needed to more thoroughly describe mechanisms of a physiologically adaptive response to feeding and to develop nursing interventions supportive of these high-risk infants.

Longitudinal Autonomic Nervous System Measures Correlate With Stress and Ulcerative Colitis Disease Activity and Predict Flare

2020 ◽  
Author(s):  
Robert P Hirten ◽  
Matteo Danieletto ◽  
Robert Scheel ◽  
Mark Shervey ◽  
Jiayi Ji ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Systemic Inflammation ◽  
High Frequency ◽  
Low Frequency ◽  
Fecal Calprotectin ◽  
Cross Sectional ◽  
Autonomic Nervous ◽  
Factor Α

Abstract Background Differences in autonomic nervous system function, measured by heart rate variability (HRV), have been observed between patients with inflammatory bowel disease and healthy control patients and have been associated in cross-sectional studies with systemic inflammation. High HRV has been associated with low stress. Methods Patients with ulcerative colitis (UC) were followed for 9 months. Their HRV was measured every 4 weeks using the VitalPatch, and blood was collected at baseline and every 12 weeks assessing cortisol, adrenocorticotropin hormone, interleukin-1β, interleukin-6, tumor necrosis factor-α, and C-reactive protein (CRP). Stool was collected at enrollment and every 6 weeks for fecal calprotectin. Surveys assessing symptoms, stress, resilience, quality of life, anxiety, and depression were longitudinally collected. Results Longitudinally evaluated perceived stress was significantly associated with systemic inflammation (CRP, P = 0.03) and UC symptoms (P = 0.02). There was a significant association between HRV and stress (low-frequency to high-frequency power [LFHF], P = 0.04; root mean square of successive differences [RMSSD], P = 0.04). The HRV was associated with UC symptoms (LFHF, P = 0.03), CRP (high frequency, P &lt; 0.001; low frequency, P &lt; 0.001; RMSSD, P &lt; 0.001), and fecal calprotectin (high frequency, P &lt; 0.001; low frequency, P &lt; 0.001; RMSSD, P &lt; 0.001; LFHF, P &lt; 0.001). Significant changes in HRV indices from baseline developed before the identification of a symptomatic or inflammatory flare (P &lt; 0.001). Conclusions Longitudinally evaluated HRV was associated with UC symptoms, inflammation, and perceived and physiological measures of stress. Significant changes in HRV were observed before the development of symptomatic or inflammatory flare.

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.

scholarly journals Autonomic nervous system activity in purebred Arabian horses evaluated according to the low frequency and high frequency spectrum versus racing performance

2016 ◽  
Vol 85 (4) ◽  
pp. 355-362 ◽  
Author(s):  
Iwona Janczarek ◽  
Witold Kędzierski ◽  
Anna Stachurska ◽  
Izabela Wilk ◽  
Ryszard Kolstrung ◽  
...  
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
High Frequency ◽  
Training Session ◽  
Low Frequency ◽  
Autonomic Nervous System Activity ◽  
System Activity ◽  
Autonomic Nervous ◽  
Nervous System Activity ◽  
Racing Performance

Emotional excitability influences horses’ performance in sports and races. The aim of the study was to analyse whether the balance of the autonomic system which can occur when sympathetic system activity is at various levels might impact the horses’ racing performance. The study was carried out on 67 purebred Arabian horses trained for racing. The following indices were analysed: low frequency (LF), high frequency (HF), and the ratio of spectrum power at low frequencies to high frequencies (LF/HF). The autonomic nervous system activity was measured × 3 during the training season, at three-month intervals. Each examination included a 30-min measurement at rest and after a training session. The racing performance indices in these horses were also analysed. Better racing results were found in horses with enhanced LF/HF. The worst racing results were determined in horses with low LF.

scholarly journals VARIABILITY OF THE HEART RHYTHM AS AN ADDITIONAL MARKER FOR DETERMINING VEGETATIVE FUNCTIONS IN PATIENTS WITH CHRONIC CEREBRAL ISCHEMIA

2018 ◽  
Vol 6 ◽  
pp. 55-60
Author(s):  
Nataliia Inhula
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Cerebral Ischemia ◽  
High Frequency ◽  
Low Frequency ◽  
Heart Rhythm ◽  
Chronic Cerebral Ischemia ◽  
Autonomic Nervous

Aim. Practical cardiology is in constant search for non-invasive vascular risk markers. Heart rhythm reflects the body's response to various stimuli of the external and internal environment. Heart rate variability (HRV) has a prognostic and diagnostic value and allows timely identification of conditions that threaten life. The results of an instrumental examination of heart rhythm fluctuations in patients suffering from chronic cerebral ischemia against the background of angina pectoris of different functional classes allows to evaluate the prognosis of the disease and select the appropriate treatment. Materials and methods. An assessment of the state of the mechanisms of regulation of physiological functions in patients suffering from chronic cerebral ischemia against the background of angina pectoris of different functional classes was obtained according to spectral and temporal analysis of heart rate variability using electrocardiographic monitoring. The spectral characteristics of the heart rate variability were studied: HF (high frequency), LF (low frequency), VLF (very low frequency). Results. Heart rhythm regulation in patients with chronic cerebral ischemia occurred under the influence of neurohumoral mechanisms. The imbalance of functional systems was caused by changes in the autonomic nervous system, which disrupted the normal functioning of the sympathetic and parasympathetic parts. We marked decrease in the activity of the parasympathetic autonomic nervous system, which changed the indices of spectral analysis, while the high-frequency component of the spectrum was characterized by a decrease, while the low-frequency component was characterized by an increase. The progression of stable angina of tension (SAT) in patients with chronic cerebral ischemia (CCI) occurred with disruption of the autonomic nervous system (ANS) and was associated with a shift in the physiological response towards sympathetic activity. This was particularly pronounced in patients in group 2 with CCI on the background of SAT III FC, as the regulatory mechanisms were in a critical state of tension against the background of long-term chronic ischemia, they showed a high level of humoral modulation of regulatory mechanisms, which was manifested by excessive VLF and high-frequency oscillations. Conclusions. A connection was established between the autonomic nervous system and chronic cerebral ischemia, which was expressed in the imbalance of the ANS, associated with reliable signs of the dominant sympathetic system, which was associated with the progression of stable angina of tension.

Distribution of the preferred clothing pressure over the whole body

2018 ◽  
Vol 89 (11) ◽  
pp. 2187-2198 ◽  
Author(s):  
Tamaki Mitsuno ◽  
Ayaka Kai
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
Hydrostatic Pressure ◽  
Body Part ◽  
Whole Body ◽  
Elastic Band ◽  
Autonomic Nervous ◽  
Pressure Load ◽  
Calibration Methods ◽  
Clothing Pressure

A system for measuring clothing pressure employing a renewed hydrostatic pressure-balancing method was examined using three calibration methods. All methods revealed an almost perfectly linear Y = X relation for the pressure load (X) and the reading of the system (Y). In the application, the distributions of elastic band pressure were examined on 21 planes from head to foot. The preferred elastic band pressures of the leg and arm were significantly higher than those of the neck and abdomen. These results are due to the large presence of the autonomic nervous system at the surfaces of the neck and abdomen. In the area of the abdomen, the preferred elastic band pressure was higher from the mammilla to the shoulder than for the anteroposterior midlines. The development of compression ware must consider appropriate tightening for each body part.

scholarly journals Association between endometriosis, headache, and migraine

2019 ◽  
Vol 11 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Burcin Karamustafaoglu Balci ◽  
Zehra Kabakci ◽  
Damla Y Guzey ◽  
Bartu Avci ◽  
Murathan Guler ◽  
...  
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
Medical Records ◽  
Cross Sectional Study ◽  
Control Group ◽  
Cross Sectional ◽  
Autonomic Nervous ◽  
Screening Questions ◽  
The Mean ◽  
Id Migraine

Introduction: Available data suggest that there is an association between endometriosis and a group of disorders including autonomic nervous system irregularities. A deeper understanding of relationship between endometriosis and autonomic nervous system is needed as it may lead to novel discoveries on the causes or consequences of endometriosis. In this study, we analyzed the prevalence of migraine in patients with endometriosis. Methods: In this cross-sectional study, medical records of women were reviewed through January 2013 to December 2017. Women with laparoscopically proven endometriosis (n = 185) were compared with those without endometriosis (n = 168). The 3-item screening questions (ID Migraine™) test was used to screen migraine. Data were analyzed using SPSS v25 (IBM Corporation). The χ2 test was used for analyzing the nominal parameters and group comparisons. Pearson χ2 was used to study the association between endometriosis and migraine. Results: The mean age was 31.86 ± 4.49 years of the endometriosis group and 28.95 ± 5.11 years of the controls (p = 0.408). The two pre-screening questions of ID Migraine test were answered positively by 86 patients of the endometriosis group (75.4%) and by 53 patients of the control group (54.6%) (p = 0.001). Of these patients, 51 (44.7% of endometriosis group) and 26 (26.8% of control group) were diagnosed as having migraine using 3-item Migraine questionnaire (p = 0.007). Conclusion: This study showed that the prevalence of migraine was significantly higher in patients with endometriosis. Because there is a strong correlation, patients with endometriosis should be screened for headache and migraine to increase the benefits of care.

scholarly journals Heart rate variability changes in mild-symptomatic, physically fit male in 4-6 weeks from the end of SARS-Cov-2 infection

2021 ◽  
Author(s):  
Mateusz Soliński ◽  
Agnieszka Pawlak ◽  
Monika Petelczyc ◽  
Teodor Buchner ◽  
Joanna Aftyka ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Respiratory Rhythm ◽  
Frequency Component ◽  
Night Time ◽  
Control Male ◽  
Autonomic Nervous ◽  
Male Subjects

Abstract SARS-Cov-2 infection, due to inflammation processes, can affect autonomic nervous system and heart rate variability (HRV) even after disease. Previous studies showed significant changes in HRV parameters in severe (including fatal) infection of SARS-Cov-2. However, HRV analysis for the asymptomatic or mild-symptomatic Covid-19 patients have not been reported. In this study, we suggested that there is an influence of a SARS-Cov-2 infection on the HRV in such patients after weeks form disease.Sixty-five ECG Holter recordings from young (mean age 22.6 ± 3.4 years), physically fit male subjects after 4-6 weeks from the second negative test (considered to be the beginning of recovery) and twenty-six control male subjects (mean age 23.2 ± 2.9 years) were considered in the study. Night-time RR time series were extracted from ECG signals. Selected linear, frequency as well as nonlinear HRV parameters were calculated. We found significant differences in Porta’s symbolic analysis parameters V0 and V2 (p<0.001), α2 (p<0.001), very low frequency component (VLF; p=0.022), and respiratory peak (from PRSA method; p=0.012). These differences may be caused by the changes of the parasympathetic autonomic nervous system as well as by the coupling of respiratory rhythm with heart rate due to an increase in pulmonary arterial vascular resistance.The results suggest that the changes in the HRV, thus autonomic nervous system, are measurable after a few weeks from the beginning of the recovery even in the post-Covid group of young and physically active population. We indicated HRV sensitive markers which could be used in the long-term monitoring of recovered patients.

Sign in / Sign up

Export Citation Format

Share Document