scholarly journals Toward an Embodied Medicine: A Portable Device with Programmable Interoceptive Stimulation for Heart Rate Variability Enhancement

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2469 ◽  
Author(s):  
Daniele Di Lernia ◽  
Pietro Cipresso ◽  
Elisa Pedroli ◽  
Giuseppe Riva
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Portable Device ◽  
Control Group ◽  
Short Term ◽  
Band Power ◽  
Future Challenges ◽  
Experimental Group ◽  
Single Blind

In this paper, we describe and test a new portable device that is able to deliver tactile interoceptive stimulation. The device works by delivering precise interoceptive parasympathetic stimuli to C-tactile afferents connected to the lamina I spinothalamocortical system. In humans, interoceptive stimulation can be used to enhance heart rate variability (HRV). To test the effectiveness of the device in enhancing HRV, 13 subjects were randomly assigned in a single-blind between-subjects design either to the experimental condition or to the control condition. In the experimental condition, subjects received stimulation with the developed device; in the control condition subjects received stimulation with static non-interoceptive pressure. Subjects’ electrocardiograms (ECG) were recorded, with sampling at 1000 Hz for 5 min as a baseline, and then during the stimulations (11 min). Time domain analyses were performed to estimate the short-term vagally mediated component (rMSSD) of HRV. Results indicated that the experimental group showed enhanced rMSSD, compared to the control group. Moreover, frequency domain analyses indicated that high frequency band power, which reflects parasympathetic activity in humans, also appeared to be enhanced in the experimental group compared to control subjects. Conclusions and future challenges for an embodied perspective of rehabilitative medicine are discussed.

Efficiency of Heart Rate Variability Biofeedback in Adolescents Aged 15–16 Years After Physical Exercise in a Cold Environment

2020 ◽  
pp. 341-349
Author(s):  
Oleg S. Zaborskiy ◽  
◽  
Liliya V. Poskotinova ◽  
Ol’ga V. Krivonogova
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Physical Exercise ◽  
Recovery Period ◽  
Stress Index ◽  
Control Group ◽  
Strength Exercise ◽  
Cold Environment ◽  
Short Term ◽  
Experimental Group

Short-term biofeedback (BF) training provides effective restoration of the cardiovascular system (CVS) after physical exercise. Purpose: assessment of CVS reactivity in adolescents aged 15–16 years during a heart rate variability (HRV) BF session following a speed-strength exercise (thricerepeated standing long jump) in the open air (from –1 to –10 °C). Materials and methods. Healthy adolescents were examined: an experimental group (n = 15) subject to HRV BF training (3 min) using Varikard equipment (Ramena, Russia) in order to increase the total HRV power and a control group (n = 12). The following stages of recording HRV and blood pressure indicators were singled out: background (initial indicators), period immediately after physical activity, and recovery period with HRV training (experimental group) or being at rest (control group). Results. During the recovery period after a HRV BF session, subjects from the experimental group showed significantly higher total HRV power compared with the control (p = 0.04). In experimental group individuals with a heart rate of less than 90 bpm against the background of its increase during BF training, stress index did not change significantly. In subjects with tachycardia (above 90 bpm), heart rate and stress index remained elevated at all stages. Conclusion. Short-term BF training (3 min) after a speed-strength exercise in a cold environment increases the total HRV power in adolescents; the degree of reduction in sympathetic response depends on the initial heart rate level. The relative increase in heart rate during HRV BF training after physical exercise in a cold environment indicates the need for a longer BF session (over 3 min) in order to achieve a more pronounced influence of vagal effects on the heart rhythm.

scholarly journals Effect of short-term exposure to particulate air pollution on heart rate variability in normal-weight and obese adults

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Luyi Li ◽  
Dayu Hu ◽  
Wenlou Zhang ◽  
Liyan Cui ◽  
Xu Jia ◽  
...  
Keyword(s):  
Heart Rate ◽  
Air Pollution ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Normal Weight ◽  
High Frequency Power ◽  
Short Term ◽  
Particulate Air Pollution ◽  
Short Term Exposure ◽  
Frequency Power

Abstract Background The adverse effects of particulate air pollution on heart rate variability (HRV) have been reported. However, it remains unclear whether they differ by the weight status as well as between wake and sleep. Methods A repeated-measure study was conducted in 97 young adults in Beijing, China, and they were classified by body mass index (BMI) as normal-weight (BMI, 18.5–24.0 kg/m2) and obese (BMI ≥ 28.0 kg/m2) groups. Personal exposures to fine particulate matter (PM2.5) and black carbon (BC) were measured with portable exposure monitors, and the ambient PM2.5/BC concentrations were obtained from the fixed monitoring sites near the subjects’ residences. HRV and heart rate (HR) were monitored by 24-h Holter electrocardiography. The study period was divided into waking and sleeping hours according to time-activity diaries. Linear mixed-effects models were used to investigate the effects of PM2.5/BC on HRV and HR in both groups during wake and sleep. Results The effects of short-term exposure to PM2.5/BC on HRV were more pronounced among obese participants. In the normal-weight group, the positive association between personal PM2.5/BC exposure and high-frequency power (HF) as well as the ratio of low-frequency power to high-frequency power (LF/HF) was observed during wakefulness. In the obese group, personal PM2.5/BC exposure was negatively associated with HF but positively associated with LF/HF during wakefulness, whereas it was negatively correlated to total power and standard deviation of all NN intervals (SDNN) during sleep. An interquartile range (IQR) increase in BC at 2-h moving average was associated with 37.64% (95% confidence interval [CI]: 25.03, 51.51%) increases in LF/HF during wakefulness and associated with 6.28% (95% CI: − 17.26, 6.15%) decreases in SDNN during sleep in obese individuals, and the interaction terms between BC and obesity in LF/HF and SDNN were both statistically significant (p <  0.05). The results also suggested that the effects of PM2.5/BC exposure on several HRV indices and HR differed in magnitude or direction between wake and sleep. Conclusions Short-term exposure to PM2.5/BC is associated with HRV and HR, especially in obese individuals. The circadian rhythm of HRV should be considered in future studies when HRV is applied. Graphical abstract

scholarly journals Effect of Acupuncture on Heart Rate Variability: A Systematic Review

2014 ◽  
Vol 2014 ◽  
pp. 1-19 ◽  
Author(s):  
Joanne W. Y. Chung ◽  
Vincent C. M. Yan ◽  
Hongwei Zhang
Keyword(s):  
Systematic Review ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Healthy Subjects ◽  
Keyword Search ◽  
Data Extraction ◽  
Meta Analysis ◽  
Low Frequency ◽  
Control Group

Aim.To summarize all relevant trials and critically evaluate the effect of acupuncture on heart rate variability (HRV).Method.This was a systematic review with meta-analysis. Keyword search was conducted in 7 databases for randomized controlled trials (RCTs). Data extraction and risk of bias were done.Results.Fourteen included studies showed a decreasing effect of acupuncture on low frequency (LF) and low frequency to high frequency ratio (LF/HF ratio) of HRV for nonhealthy subjects and on normalized low frequency (LF norm) for healthy subjects. The overall effect was in favour of the sham/control group for high frequency (HF) in nonhealthy subjects and for normalized high frequency (HF norm) in healthy subjects. Significant decreasing effect on HF and LF/HF ratio of HRV when acupuncture was performed on ST36 among healthy subjects and PC6 among both healthy and nonhealthy subjects, respectively.Discussion.This study partially supports the possible effect of acupuncture in modulating the LF of HRV in both healthy and nonhealthy subjects, while previous review reported that acupuncture did not have any convincing effect on HRV in healthy subjects. More published work is needed in this area to determine if HRV can be an indicator of the therapeutic effect of acupuncture.

The use of heart rate turbulence and heart rate variability in the assessment of autonomic regulation and circadian rhythm in patients with systemic lupus erythematosus without apparent heart disease

Lupus ◽  
2017 ◽  
Vol 27 (3) ◽  
pp. 436-444 ◽  
Author(s):  
A R Poliwczak ◽  
E Waszczykowska ◽  
B Dziankowska-Bartkowiak ◽  
M Koziróg ◽  
K Dworniak
Keyword(s):  
Systemic Lupus Erythematosus ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Lupus Erythematosus ◽  
High Frequency ◽  
Autonomic Function ◽  
Disease Duration ◽  
Control Group ◽  
Systemic Lupus ◽  
Heart Rate Turbulence

Background Systemic lupus erythematosus is a progressive autoimmune disease. There are reports suggesting that patients even without overt signs of cardiovascular complications have impaired autonomic function. The aim of this study was to assess autonomic function using heart rate turbulence and heart rate variability parameters indicated in 24-hour ECG Holter monitoring. Methods Twenty-six women with systemic lupus erythematosus and 30 healthy women were included. Twenty-four hour ambulatory ECG-Holter was performed in home conditions. The basic parameters of heart rate turbulence and heart rate variability were calculated. The analyses were performed for the entire day and separately for daytime activity and night time rest. Results There were no statistically significant differences in the basic anthropometric parameters. The mean duration of disease was 11.52 ± 7.42. There was a statistically significant higher turbulence onset (To) value in patients with systemic lupus erythematosus, median To = –0.17% (minimum –1.47, maximum 3.0) versus To = –1.36% (minimum –4.53, maximum –0.41), P < 0.001. There were no such differences for turbulence slope (Ts). In the 24-hour analysis almost all heart rate variability parameters were significantly lower in the systemic lupus erythematosus group than in the healthy controls, including SDANN and r-MSSD and p50NN. Concerning the morning activity and night resting periods, the results were similar as for the whole day. In the control group, higher values in morning activity were noted for parameters that characterise sympathetic activity, especially SDANN, and were significantly lower for parasympathetic parameters, including r-MSSD and p50NN, which prevailed at night. There were no statistically significant changes for systemic lupus erythematosus patients for p50NN and low and very low frequency. There was a positive correlation between disease duration and SDNN, R = 0.417; P < 0.05 and SDANN, R = 0.464; P < 0.05, a negative correlation between low/high frequency ratio and r-MSSD, R = –0.454; P < 0.05; p50NN, R = –0.435; P < 0.05 and high frequency, R = –0.478; P < 0.05. In contrast, there was no statistically significant correlation between heart rate turbulence and other variables evaluated, including disease duration and the type of autoantibodies. Conclusion: Our study confirms the presence of autonomic disorders with respect to both heart rate variability and heart rate turbulence parameters and the presence of diurnal disturbances of sympathetic–parasympathetic balance. Further studies are required.

Mind–body interactive qigong improves physical and mental aspects of quality of life in inpatients with stroke: A randomized control study

2019 ◽  
Vol 18 (8) ◽  
pp. 658-666 ◽  
Author(s):  
Ching-Hsiang Chen ◽  
Kuo-Sheng Hung ◽  
Yu-Chu Chung ◽  
Mei-Ling Yeh
Keyword(s):  
Quality Of Life ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
High Frequency ◽  
Standard Care ◽  
Low Frequency ◽  
Control Group ◽  
Subacute Stroke ◽  
Interactive Exercise

Background: Stroke, a medical condition that causes physical disability and mental health problems, impacts negatively on quality of life. Post-stroke rehabilitation is critical to restoring quality of life in these patients. Objectives: This study was designed to evaluate the effect of a mind–body interactive qigong intervention on the physical and mental aspects of quality of life, considering bio-physiological and mental covariates in subacute stroke inpatients. Methods: A randomized controlled trial with repeated measures design was used. A total of 68 participants were recruited from the medical and rehabilitation wards at a teaching hospital in northern Taiwan and then randomly assigned either to the Chan-Chuang qigong group, which received standard care plus a 10-day mind–body interactive exercise program, or to the control group, which received standard care only. Data were collected using the National Institutes of Health Stroke Scale, Hospital Anxiety and Depression Scale, Short Form-12, stroke-related neurologic deficit, muscular strength, heart rate variability and fatigue at three time points: pre-intervention, halfway through the intervention (day 5) and on the final day of the intervention (day 10). Results: The results of the mixed-effect model analysis showed that the qigong group had a significantly higher quality of life score at day 10 ( p<0.05) than the control group. Among the covariates, neurologic deficit ( p=0.04), muscle strength ( p=0.04), low frequency to high frequency ratio ( p=0.02) and anxiety ( p=0.04) were significantly associated with changes in quality of life. Conversely, heart rate, heart rate variability (standard deviation of normal-to-normal intervals, low frequency and high frequency), fatigue and depression were not significantly associated with change in quality of life ( p >0.05). Conclusions: This study supports the potential benefits of a 10-day mind–body interactive exercise (Chan-Chuang qigong) program for subacute stroke inpatients and provides information that may be useful in planning adjunctive rehabilitative care for stroke inpatients.

Effects of Electrical Acupuncture on Acupoint BL15 Evaluated in Terms of Heart Rate Variability, Pulse Rate Variability and Skin Conductance Response

2006 ◽  
Vol 34 (01) ◽  
pp. 23-36 ◽  
Author(s):  
Chih-Chieh Hsu ◽  
Ching-Sung Weng ◽  
Te-Sheng Liu ◽  
Yuh-Show Tsai ◽  
Yung-Hsien Chang
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Skin Conductance ◽  
Pulse Rate ◽  
Skin Conductance Response ◽  
Control Group ◽  
Pulse Rate Variability ◽  
Electrical Acupuncture ◽  
Experimental Group ◽  
Frequency Power

In this research, heart rate variability (HRV), pulse rate variability (PRV) and human skin conductance (SC) of all acupoints on Heart Meridian were used to evaluate the effects of electrical acupuncture (EA) on acupoint BL15 (Bladder Meridian). Ten healthy volunteers (aged 23 ± 6) were selected as the control group on the first day, and then used again as the experimental group on the second day. The control group received sham EA during the study, while subjects of the experimental group were stimulated by 2 Hz EA on acupoint BL15 for 10 minutes. Electrocardiogram (ECG), wrist blood pressure pulse meter and skin conductance response (SCR) device were used to measure and analyze HRV, PRV and SCR for the two groups before and after stimulation. From the spectrum analysis of ECG and pulse pressure graph, we found that the EA applied on BL15 could induce a significant increase in the normalized high frequency power (nHFP) component of HRV and PRV, as well as a significant decrease in the normalized low frequency power (nLFP) part ( p < 0.05). Moreover, both the heart rate and pulse rate were reduced in the analysis of the time domain of ECG and PRV. Furthermore, most of the SCR values at acupoints were decreased after stimulation. These results also indicate that the stimulation of BL15 by EA could cause relaxation, calmness and reduce feeling of tension or distress.

scholarly journals Heart Rate Variability and Inflammatory Response in Rats With Lipopolysaccharide-Induced Endotoxemia

2015 ◽  
pp. S669-S676 ◽  
Author(s):  
I. ZILA ◽  
D. MOKRA ◽  
J. KOPINCOVA ◽  
M. KOLOMAZNIK ◽  
M. JAVORKA ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Body Temperature ◽  
High Frequency ◽  
Heart Tissue ◽  
Frequency Domain Analysis ◽  
Control Group ◽  
Necrosis Factor Alpha ◽  
Saline Administration ◽  
Tissue Homogenates

The aim of the study was to evaluate short-term heart rate variability (HRV) as an index of cardiac autonomic control in rats with lipopolysaccharide (LPS)-induced endotoxemia. Animals were injected intraperitoneally with LPS (100 µg/kg b.w.) and control group with an equivalent volume of saline. ECG recordings were done before (base) and 60, 120, 180, 240 and 300 min after LPS or saline administration. HRV magnitude was quantified by time and frequency-domain analysis (mean RR interval, SDRR, RMSSD, spectral powers in low (LF) and high frequency (HF) bands. Heart tissue homogenates and plasma were analyzed to determine interleukin 6 (IL-6), tumor necrosis factor alpha (TNF-α) and oxidative stress level (TBARS). Administration of lipopolysaccharide was followed by continuous rise in colonic body temperature compared to saline-treated controls. Endotoxemia in rats was accompanied by significant decrease in HRV spectral activity in high-frequency range at maximal body temperature (logHFpower: 1.2±0.5 vs. 1.9±0.6 ms2, P<0.01). Increased IL-6 was found in heart tissue homogenates of LPS rats (8.0±0.6 vs. 26.4±4.8 pg/ml, (P<0.05). In conclusions, reduced HRV in HF band may indicate a decreased parasympathetic activity in LPS-induced endotoxemia as basic characteristics of altered cardiac control during response to endotoxemia.

scholarly journals The Effect of Respiratory and Physical Intervention on Selected Parameters of Heart Rate Variability in Hematooncological Patients after Treatment

2020 ◽  
Vol 14 (2) ◽  
pp. 18-24
Author(s):  
Martina Šperková ◽  
Kateřina Kapounková ◽  
Iva Hrnčiříková ◽  
Zora Svobodová ◽  
Alexandra Malá ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
University Hospital ◽  
Control Group ◽  
Intervention Programme ◽  
Time Points ◽  
Respiratory Training ◽  
The University ◽  
Respiratory Intervention ◽  
Experimental Group

The aim of this research was determined the effect of respiratory intervention for twelve weeks and physical intervention for twelve weeks on selected parameters of heart rate variability in hematooncological patients after treatment. Spectral analysis of heart rate variability was measured by DiANS PF8 machine with Medical DiANS PC software. Evaluated were complex indices – Total score and Sympathovagal balance (S-V balance). The intervention programme was composed of three months of respiratory training and then three months of physical training. The experimental group, which absolved this combination of respiratory and physical intervention, was assessed at free time points: firstly, before the respiratory intervention, secondly between the respiratory and the physical intervention and thirdly after the physical intervention. The control group (without intervention) was measured twice between six months. 30 hematooncological patients (16 women and 14 men) were participated in this research, ranging in age 53,74±14,76 years from Internal Hematology and Oncology Clinic of The University Hospital Brno. Results of selected parameters of heart rate variability showed improvements, but without statistically significant effect of intervention programme.

scholarly journals Interval Hypoxic Training in Rehabilitation Program for Adolescents with Overweight / Obesity and Comorbid Arterial Hypertension: Open-Label Randomized Study

2021 ◽  
Vol 20 (1) ◽  
pp. 51-61
Author(s):  
Alexandra V. Mashanskaya ◽  
Anna V. Pogodina ◽  
Alina V. Atalyan ◽  
Lyubov V. Rychkova ◽  
Olga V. Bugun ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Arterial Hypertension ◽  
Aerobic Training ◽  
Rehabilitation Program ◽  
Control Group ◽  
Hypoxic Training ◽  
Psychoemotional State ◽  
Experimental Group ◽  
Age And Sex

Background. Searching for new strategies for the rehabilitation of adolescents with obesity and comorbid arterial hypertension (AHT) before significant pathological changes development in the cardiovascular system remains the urgent challenge. Objective. The aim of the study was to examine the effect of interval hypoxic training (IHT) on blood pressure (BP) levels in adolescents with overweight / obesity and comorbid AHT. Methods. Adolescents aged 14-17 years with body mass index SDS ≥ 1 and grade I AHT (mean level of systolic and/or diastolic BP ≥ 95th percentile for population of corresponding age, sex and height) have been randomized to the group «aerobic training» (treadmill walking) and “aerobic training + IHT” (usage of hypoxicator in intermittent operation cycles). All patients were on subcaloric diet (10% reduction in caloric intake for given age). Primary outcome measure was the difference between groups on systolic/diastolic BP levels according to 24-hour BP monitoring after completion of training program (10 classes each). The effects of IHT on body composition (bioelectrical impedance analysis), heart rate variability and psychoemotional state (Spielberger scale, assessment of health, activity and mood) were further estimated. Results. 43 patients were assigned to the index group, and 42 — to the control group. 67 patients have completed the research program. 5 patients (12%) from the IHT group and 13 patients (31%; p = 0.029) from the control group prematurely discontinued participation in the trial due to poor exercise tolerance. The groups were comparable in baseline systolic and diastolic BP. Decrease in BP occurred in both groups after 10 workouts. There were no differences in decrease value: mean difference for SBP was 2.4 mm Hg (95% CI -6.6 ... 1.8), for DBP — 0.2 mm Hg (-3.6 ... 4.0). However, the incidence of reaching the targeted SBP (< 95th percentile for the corresponding age and sex) after completion of the treatment was recorded in 66% patients in the experimental group and in 42% patients in the control group (p = 0,047). Positive dynamics in several indicators of heart rate variability and psychoemotional state were mentioned in the IHT group. Conclusion. The IHT implementation in the complex of rehabilitation program for adolescents with overweight / obesity and AHT has no additional positive effect on BP levels. However, the incidence of reaching the targeted SBP (< 95th percentile for the corresponding age and sex) after completion of the treatment was recorded in 66% patients in the experimental group and in 42% patients in the control group (p = 0,054).

Effects of Heart Rate Variability Biofeedback in Patients With Acute Ischemic Stroke: A Randomized Controlled Trial

2019 ◽  
Vol 22 (1) ◽  
pp. 34-44
Author(s):  
Wan-Ling Chang ◽  
Jiunn-Tay Lee ◽  
Chi-Rong Li ◽  
Amy H. T. Davis ◽  
Chia-Chen Yang ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Ischemic Stroke ◽  
Cognitive Impairment ◽  
Psychological Distress ◽  
Acute Ischemic Stroke ◽  
Autonomic Function ◽  
Control Group ◽  
Randomized Controlled ◽  
Experimental Group

Background: Autonomic dysfunction, cognitive impairment, and psychological distress are associated with poorer prognosis in patients with acute ischemic stroke (AIS). Heart rate variability (HRV) biofeedback (BF) improves autonomic dysfunction, cognitive impairment, and psychological distress in other patient populations, but its effect in patients with AIS is still unclear. Objective: This study investigated the effects of an HRVBF intervention on autonomic function, cognitive impairment, and psychological distress in patients with AIS. Method: In this randomized, controlled, single-blind trial, patients with AIS were randomly assigned to the experimental or control group. The experimental group received four HRVBF training sessions. The control group received usual care. Repeated measures of HRV, mini-mental status examination (MMSE), and Hospital Anxiety and Depression Scales (HADS) were collected prior to and at 1 and 3 months postintervention. Results: A total of 35 patients completed the study (19 experimental, 16 control). HRV and HADS significantly improved in the experimental group ( p < .001) but not in the control group. Likewise, only the experimental group showed significant improvements in HRV, MMSE, and HADS over time ( p < .05). Conclusion: HRVBF is a promising intervention for improving autonomic function, cognitive impairment, and psychological distress in patients with AIS. More studies of HRVBF interventions are needed to further optimize the effects of HRVBF on autonomic, cognitive, and psychological function in patients with AIS.

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