scholarly journals Changes in Electroencephalographic Results and Heart Rate Variability after Exposure to Green Landscape Photographs Correlated with Color Temperature and Illumination Level

2021 ◽  
Vol 24 (6) ◽  
pp. 639-649
Author(s):  
Min Jung Lee ◽  
Wook Oh
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Traffic Congestion ◽  
Light Emitting Diode ◽  
Visual Display ◽  
Substantial Effect ◽  
Wave Activity ◽  
Color Temperature ◽  
Lighting Condition ◽  
Significant Difference

Background and objective: Various images from visual display terminals (VDTs) as well as living lighting are important parts of our daily life; thus, properly controlling the lighting environment – that is, illuminance, color temperature and good images from VDTs – can have a substantial effect on improving the mental health and work efficiency in everyday life. We examined electroencephalography (EEG) and heart rate variability (HRV) responses to various lighting conditions in 25 university students as they viewed images of a green landscape or traffic congestion.Methods: EEG was performed in darkness and when the room was illuminated with 10 different light-emitting diode (LED) color temperatures, while the EEG and HRV responses to green landscape or traffic congestion image stimuli were measured in darkness and during room illumination with three different LED color temperatures.Results: We found a significant difference between darkness and high LED illumination (400 lx) at 7 (CZ, F4, FZ, O1, O2, OZ, and T6) of 30 channels, while the alpha wave activity increased during darkness. In the second experiment, the green landscape image stimuli in the 30 lx–2600 K lighting condition elicited theta wave activity on the EEG, whereas the traffic congestion image stimuli under high LED illumination elicited high beta and gamma wave activities. Moreover, the subjects exhibited better stress coping ability and heart rate stability in response to green landscape image stimuli under illuminated conditions, according to their HRV.Conclusion: These results suggest that lower color temperatures and illumination levels alleviate tension, and that viewing green landscape image stimuli at low illumination, or in darkness, is effective for reducing stress. Conversely, high illumination levels and color temperatures are likely to increase tension and stress in response to traffic congestion image stimuli.

scholarly journals Comparative Review of the Correlation Between Electroneurography, Electromyography, Hematology Tests, or the Heart Rate Variability Test, with an Improvement in the Severity of Bell’s Palsy Symptoms

2021 ◽  
Vol 38 (3) ◽  
pp. 192-199
Author(s):  
Ji-Min Hwang ◽  
Jun-Yeon Kim ◽  
Ha-Na Kim ◽  
Kyeong-Ju Park ◽  
Min-Gi Jo ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Negative Correlation ◽  
Bell’S Palsy ◽  
Nerve Degeneration ◽  
Total Power ◽  
Mean Corpuscular Hemoglobin ◽  
Bell's Palsy ◽  
Comparative Review ◽  
Significant Difference

Background: In this retrospective study, we aimed to determine which diagnostic tests were associated with an improvement in Bell’s palsy symptoms. Methods: There were 30 patients who visited Kyung Hee University Korean Medicine Hospital from April 1, 2017 to February 29, 2020, and who received East-West collaboration treatment for Bell’s palsy. The tests included electroneurography (ENoG), electromyography (EMG), hematology, and heart rate variability (HRV) results which were used to determine if any test correlated with improvement of Bell’s palsy symptoms. Results: The initial severity of symptoms did not correlate with the tests performed, with the exception of mean corpuscular hemoglobin concentration (p = 0.013). For both ENoG for oculi degeneration and mean EMG tests, the rate of nerve degeneration showed a significant negative correlation with the improvement of Bell’s palsy symptoms. Amongst the HRV test indicators, the square root of the mean of the sum of the squares of differences between the adjacent normal R-R wave interval, the standard deviation of intervals, total power, very low frequency, and high frequency of the wave was negatively correlated with improvement of Bell’s palsy symptoms. Similarly, glycosylated hemoglobin Type A1c (HbA1c) and erythrocyte sedimentation rate (ESR) showed a negative correlation with improvement of symptoms of Bell’s palsy. With the exception of HbA1c and ESR, the remaining hematology test results showed no significant difference when comparing before and after treatment. Conclusion: ENoG, EMG, HRV test, HbA1c, and ESR negatively correlated with improvements in Bell’s palsy symptoms and may determine the prognosis of Bell’s palsy.

scholarly journals Validation of the Software-Hardware Complex “Rytm” for Measurement of the RR Intervals and Heart Rate Variability Analysis During Exercise and Recovery Period

2021 ◽  
Vol 21 (1) ◽  
pp. 61-68
Author(s):  
Lyubomyr Vovkanych ◽  
Yuriy Boretsky ◽  
Viktor Sokolovsky ◽  
Dzvenyslava Berhtraum ◽  
Stanislav Kras
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Recovery Period ◽  
Intraclass Correlation ◽  
Step Test ◽  
Heart Rate Variability Analysis ◽  
Test Protocol ◽  
Rr Intervals ◽  
Significant Difference ◽  
Very High

The study purpose was estimation of the accuracy of RR time series measurements by SHC “Rytm” and validity of derived heart rate variability (HRV) indexes under physical loads and recovery period. Materials and methods. The participants were 20 healthy male adults aged 19.7 ± 0.23 years. Data was recorded simultaneously with CardioLab CE12, Polar RS800, and SHC “Rytm”. Test protocol included a 2 minute step test (20 steps per minute, platform height – 40 cm) with the next 3 minute recovery period. HRV indexes were calculated by Kubios HRV 2.1. Results. The RR data bias in the case of physical loads was -0.06 ms, it increased to 0.09-0.33 ms during the recovery period. The limits of agreement for RR data ranged from 3.7 ms to 22.8 ms, depending on the period of measurements and pair of compared devices. It is acceptable for the heart rate and HRV estimation. The intraclass correlation coefficients (0.62–1.00) and Spearman correlation coefficient (0.99) were high enough to suggest very high repeatability of the data. We found no significant difference (p > 0.05) and good correlation (r = 0.94-1.00) between the majority of HRV indexes, calculated from data of Polar RS800 and SHC “Rytm” in conditions of physical loads (except for LF/HF ratio) and in the recovery period. The only one index (RMSSD) was different (p < 0.05) in case of Polar RS800 and SHC “Rytm” data, obtained in the recovery period. The largest numbers of different HRV indexes have been found during the comparison of CardioLab CE12 and Polar RS800 – RMSSD, pNN50, and SD1. Correlation between HRV indexes (r = 0.81-1.00) was very high in all pairs of devices in all periods of measurements. Conclusions. The SHC “Rytm” appears to be acceptable for RR intervals registration and the HRV analysis during physical loads and recovery period.

Heart Rate Variability During Early Mobilization in Patients with Acute Ischemic Stroke

2018 ◽  
Vol 80 (1-2) ◽  
pp. 50-54 ◽  
Author(s):  
Masafumi Nozoe ◽  
Miho Yamamoto ◽  
Miki Kobayashi ◽  
Masashi Kanai ◽  
Hiroki Kubo ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Nervous Activity ◽  
Early Mobilization ◽  
Sympathetic Nervous Activity ◽  
Parasympathetic Nerve ◽  
Significant Difference ◽  
Sympathetic Nervous

Autonomic dysfunction is one of the predictors of poor outcome in patients with acute ischemic stroke. We compared the heart rate variability (HRV) during early mobilization in patients with or without neurological deterioration (ND). We enrolled 7 acute ischemic patients with ND and 14 without ND and measured their HRV in the rest and mobilization by electrocardiography. There was a significant difference in sympathetic nervous activity during mobilization between the 2 groups. However, no significant differences in blood pressure, heart rate, and parasympathetic nerve activity were observed. In patients with acute ischemic stroke, it is likely that the increase in sympathetic nervous activity during mobilization is associated with ND.

To Assess and Correlate Resting Heart Rate, Body Composition and Heart Rate Variability in Judo and Wushu Players

2021 ◽  
Vol 6 (3) ◽  
pp. 413-421
Author(s):  
Sapna Yadav ◽  
Gaurav Kadyan
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Body Composition ◽  
Body Mass ◽  
Body Fat ◽  
Visceral Fat ◽  
Whole Body ◽  
Resting Heart Rate ◽  
Body Density ◽  
Significant Difference

Background: This study aimed to compare and correlate the resting heart rate, body composition and heart rate variability among judo and wushu players. Method: 40 athletes (20 judo and 20 wushu players) were included in the study. Body composition (BMI, subcutaneous body mass, skeletal body mass, body fat %, body density, Visceral fat, Lean body mass) was evaluated with the help of 7 skinfold thickness and body circumferences with the help of Harpenden calliper and measuring tape respectively. HRV (RMSSD, SDNN, LF/HF, LFnu and HFnu) was recorded in resting state (~5min) with the help of Heart wear shimmer ECG device. Result: No significant difference of body composition and HRV variables (p> 0.05) was found between the two groups except Body fat % and body density (p<0.05) which differ significantly among the two groups. In Judo, LF/HF and LFnu showed significant positive correlation with BMI (p<0.05, r=-0.488), subcutaneous whole-body mass (p<0.05, r=-0.464), visceral fat (p<0.05, r =-0.508), and body fat % (p<0.05, r =-0.626. Whereas HFnu showed significant negative correlation with BMI (p<0.05, r=-0.488), subcutaneous whole-body mass (p<0.05, r=-0.464), visceral fat (p<0.05, r=-0.505) and body fat % (p<0.05, r=-0.626). Whereas no correlation was found between HRV and Body composition in wushu players. Conclusion: Reduction in body fat % and visceral fat in judo players indicate improved sympathovagal balance which can be due to the adaptation induced by training loads. Similar results were not seen in wushu players because of high amount of body fat% and visceral fat. Keywords: Body composition, combat sports, heart rate variability, Body fat %, resting heart rate.

The Comparisons of Heart Rate Variability and Perceived Exertion During Simulated Cycling with Various Viewing Devices

2008 ◽  
Vol 17 (6) ◽  
pp. 575-583 ◽  
Author(s):  
Shih-Fong Huang ◽  
Po-Yi Tsai ◽  
Wen-Hsu Sung ◽  
Chih-Yung Lin ◽  
Tien-Yow Chuang
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Density ◽  
Power Spectral Density ◽  
Perceived Exertion ◽  
Low Frequency ◽  
Control Group ◽  
Threshold Intensity ◽  
Power Spectral ◽  
Significant Difference

Sympathovagal modulation during immersion in a virtual environment is an important influence on human performance of a task. The aim of this study is to investigate sympathovagal modulation using heart rate variability and perceived exertion during exercise in a virtual reality (VR) environment. Sixteen young healthy volunteers were tested while using a stationary bicycle and maintained at an anaerobic threshold intensity for exercise sessions of approximately 10 min duration. Four randomized viewing alternatives were provided including desktop monitor, projector, head mounted device (HMD), and no simulation display. The “no simulation display” served as the control group. A quick ramp exercise test was conducted and maintained at an anaerobic threshold intensity for each session to evaluate power spectral density and rating of perceived exertion (RPE). The sampled heart rate data were rearranged by cubic spline interpolation into power spectrums spanning the ultra-low frequency (ULF) to high frequency (HF) range. A significant difference was found between the no-display and projector groups for total power (TP) and very low frequency (VLF) components. In particular, there was a significant difference when comparing HMD and no-display exercise RPE curves within 6 min of cycling and at the termination of the exercise. A significant difference was also achieved in projector vs. control group comparison at the termination of the exercise. Our results indicate that the use of HMD and the projected VR during cycling can reduce the TP and VLF power spectral density through a proposed decrease in the renin-angiotensin system, with the implication that this humoral effect may enable anaerobic exercise for longer durations through a reduction in sympathetic tone and subsequent increased blood flow to the muscles.

Heart rate variability and dissociation in panic disorder

2011 ◽  
Vol 26 (S2) ◽  
pp. 147-147
Author(s):  
T. Diveky ◽  
D. Kamaradova ◽  
A. Grambal ◽  
K. Latalova ◽  
J. Prasko ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Panic Disorder ◽  
Frequency Band ◽  
High Frequency ◽  
Power Spectra ◽  
Low Frequency ◽  
Very Low Frequency ◽  
Significant Difference ◽  
Before And After

The aim of our study is to measure very low frequency band (VLF), low frequency band (LF) and high frequency band (HF) components of R-R interval during orthostatic experiment in panic disorder patients before and after treatment.MethodsWe assessed heart rate variability in 19 patients with panic disorder before and after 6-weeks treatment with antidepressants combined with CBT and 18 healthy controls. They were regularly assessed on the CGI, BAI and BDI. Heart rate variability was assessed during 5 min standing, 5 min supine and 5 min standing positions before and after the treatment. Power spectra were computed using a fast Fourier transformation for very low frequency - VLF (0.0033 - 0.04 Hz), low-frequency - LF (0.04-0.15 Hz) and high frequency - HF (0.15-0.40 Hz) powers.Results19 panic disorder patients entered a 6-week open-label treatment study with combination of SSRI and cognitive behavioral therapy. A combination of CBT and pharmacotherapy proved to be the effective treatment of patients. They significantly improved in all rating scales. There were highly statistical significant differences between panic patients and control group in all components of power spectral analysis in 2nd and in two component of 3rd (LF and HF in standing) positions. There was also statistically significant difference between these two groups in LF/HF ratio in supine position (2nd). During therapy there was tendency to increasing values in all three positions in components of HRV power spectra, but there was only statistically significant increasing in HF1 component.Supported by project IGA MZ ČR NS 10301-3/2009

scholarly journals DYNAMICS OF HEART RATE VARIABILITY IN CHILDREN OPERATED FOR VENTRICULAR SEPTAL DEFECT IN ТНЕ PROCESS OF SANATORIAL SPA TREATMENT

2020 ◽  
Vol 26 (3) ◽  
pp. 68-70
Author(s):  
N. N. Kaladze ◽  
А. Уи. Iushchenko ◽  
V. N. Lukyanenko ◽  
М. Е. Kutkin
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Ventricular Septal Defect ◽  
Septal Defect ◽  
Medical Rehabilitation ◽  
Control Group ◽  
Healthy Children ◽  
Time Analysis ◽  
Nordic Walking ◽  
Significant Difference

The purpose of the study is to study the effectiveness of medical rehabilitation in children operated on for a ventricular septal defect, based on the dynamics of heart rate variability indicators. Material and methods of research. Heart rate variability was evaluated in 75 children operated on for ventricular septal defect. The control group (CG) consisted of 30 healthy children. The effectiveness of medical rehabilitation was assessed by the dynamics of heart rate variability indicators. Children of the 1st group (20 people) took the cardiometabolic drug Elkar at a dose of 30 mg/kg/day for 1 month. With children of the 2nd group (20 people) for 3 months, Nordic walking classes were held (NW). In addition, children of the 2nd group received the drug Elkar for 1 month (30 mg/kg). Results. According to the time analysis of heart rate variability, operated children had significantly lower values of SDNN 82 [69;103] (p<0.001), SDANNi 50.5 [39;87] (p<0.05), SDNNi 69.5 [54;80] (p<0.05), rMSSD 50.5 [39;87] (p<0.05), pNN50 % 18.4 [6.7;28.3] (p<0.05) lower power in the high-frequency range of the spectrum (p<0.001) and a change in the vegetative balance towards the predominance of the sympathetic division of the autonomic nervous system (LF/HF=3.16, p=0.009) than in the control group. After the treatment, there was no reliable HRV dynamics in children who received Elcar. There was a significant difference between SDNN and rMSSD with KG. In the second group, there was a significant increase in HRV according to SDNN data by 37.7 % (p<0.01), SDANNi by 45.6 % (p<0.05), rMSSD by 6.5 % (p<0.05), pNN50 % by 32.7 % (p<0.05). The difference in indicators with CG is leveled. Conclusions. In children operated on for VSD, there was a decrease in the parameters of the time analysis of HRV in comparison with healthy peers (p<0.05). The combined use of Nordic walking and Elkar have a normalizing effect on the HRV, causing a decrease in the tension of the Central circuit of heart rate regulation, significantly increasing the parasympathetic effect on the heart rate.

scholarly journals Effects of agomelatine on heart rate variability in patients with coronary artery disease and depression

2021 ◽  
Vol 10 (1) ◽  
pp. 40-49
Author(s):  
T. G. Nonka ◽  
E. V. Lebedeva ◽  
A. N. Repin
Keyword(s):  
Coronary Artery Disease ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Coronary Artery ◽  
Chronic Coronary Artery Disease ◽  
Depressed Patients ◽  
Significant Difference ◽  
Life Threatening ◽  
Group 2 ◽  
Artery Disease

Aim. To determine heart rate variability (HRV) in depressed patients with chronic coronary artery disease (CAD) and to assess the effects of agomelatine on HRV.Methods. 74 patients with CAD (class 3-4 angina pectoris) were recruited in a study. Patients (n = 45) with CAD and depression were assigned to Group 1, whereas CAD patients (n = 29) without any signs of depression were assigned to Group 2. 17 patients received agomelatine (Subgroup 1) and 28 patients did not take any antidepressants (Subgroup 2). HRV was measured using SCHILLER MT-200 Holter-ECG apparatus at baseline and after 6 months.Results. Patients with depression demonstrated a significant decrease in HRV compared to non-depressed patients (pNN50% (3.9 [2.2; 5.4] vs 5.7 [2.9; 12.6], p = 0.03), SDANN (81 [63; 97] ms vs 91 [79; 102] ms, p = 0.06), SDNNindx (46 [36; 56] ms vs 55 [48; 66] ms, p = 0.002), rMSSD (28 [21; 36] ms vs 33 [ 29; 45] ms, p = 0.02), SDNN (97 [75; 121] ms vs 110 [98; 127] ms, p = 0.02). Subgroups 1 and 2 did not differ in HRV (p>0.05). After 6 months, significant differences in the following parameters were found in those patients who received agomelatine therapy and those who did not: rMSSD (36.5 [28.5; 51] ms vs 26.5 [25; 32] ms, p = 0.02), SDANN (88 [72,5; 114,5] ms vs 67,5 [58; 83] ms, p = 0.03), SDNN strives to a significant difference - 100 [87; 133.5] ms vs 85.5 [75; 103] ms, p = 0.07.Conclusion. HRV significantly decreased in depressed patients with CAD suggesting autonomic dysfunction and worsening their prognosis. Agomelatine therapy in patients with CAD is effective in treating heart rate variability and reducing the risk of developing life-threatening arrhythmias.Key

scholarly journals Effect of Virtual Reality on Stress Reduction and Change of Physiological Parameters Including Heart Rate Variability in People With High Stress: An Open Randomized Crossover Trial

2021 ◽  
Vol 12 ◽  
Author(s):  
Hyewon Kim ◽  
Dong Jun Kim ◽  
Seonwoo Kim ◽  
Won Ho Chung ◽  
Kyung-Ah Park ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Virtual Reality ◽  
Rating Scale ◽  
High Stress ◽  
Mental Healthcare ◽  
Numeric Rating Scale ◽  
Physiological Parameters ◽  
Relaxation Phase ◽  
Significant Difference

Introduction: Although, attempts to apply virtual reality (VR) in mental healthcare are rapidly increasing, it is still unclear whether VR relaxation can reduce stress more than conventional biofeedback.Methods: Participants consisted of 83 healthy adult volunteers with high stress, which was defined as a score of 20 or more on the Perceived Stress Scale-10 (PSS-10). This study used an open, randomized, crossover design with baseline, stress, and relaxation phases. During the stress phase, participants experienced an intentionally generated shaking VR and serial-7 subtraction. For the relaxation phase, participants underwent a randomly assigned relaxation session on day 1 among VR relaxation and biofeedack, and the other type of relaxation session was applied on day 2. We compared the State-Trait Anxiety Inventory-X1 (STAI-X1), STAI-X2, the Numeric Rating Scale (NRS), and physiological parameters including heart rate variability (HRV) indexes in the stress and relaxation phases.Results: A total of 74 participants were included in the analyses. The median age of participants was 39 years, STAI-X1 was 47.27 (SD = 9.92), and NRS was 55.51 (SD = 24.48) at baseline. VR and biofeedback significantly decreased STAI-X1 and NRS from the stress phase to the relaxation phase, while the difference of effect between VR and biofeedback was not significant. However, there was a significant difference in electromyography, LF/HF ratio, LF total, and NN50 between VR relaxation and biofeedback.Conclusion: VR relaxation was effective in reducing subjectively reported stress in individuals with high stress.

scholarly journals Heart Rate Variability Of Moscow Secondary Schoolboys Living In Different Environmental Conditions

2021 ◽  
Vol 265 ◽  
pp. 06005
Author(s):  
Мarya Danacheva ◽  
Viktor Glebov ◽  
Vladimir Torshin ◽  
Vasily Shevtsov ◽  
Dilyara Efremova ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Comparative Analysis ◽  
Environmental Conditions ◽  
Wave Activity ◽  
The State ◽  
Social Conditions ◽  
Adaptive Processes ◽  
Adaptation Processes ◽  
Comprehensive Study

The presented empirical study assesses the state of the cardiovascular system of Moscow schoolchildren living in different environmental conditions. 233 practically healthy schoolchildren (109 boys and 124 girls aged 11.4 to 12.6 years) took part in the comprehensive study of HRV and the state of adaptive processes when living in different ecological conditions of the capital megapolis. On the basis of different ecological and social conditions the schoolchildren were divided into 4 compared groups. The comparative analysis of the obtained HRV data of schoolchildren of different groups showed differences in the adaptation processes and in the indices of the wave activity of the sympathetic and parasympathetic departments of the ANS.

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