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Sorinas J, Ferrández JM, Fernandez E. Brain and Body Emotional Responses: Multimodal Approximation for Valence Classification. SENSORS 2020; 20:s20010313. [PMID: 31935909 PMCID: PMC6982758 DOI: 10.3390/s20010313] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 01/02/2020] [Accepted: 01/03/2020] [Indexed: 11/16/2022]
Abstract
In order to develop more precise and functional affective applications, it is necessary to achieve a balance between the psychology and the engineering applied to emotions. Signals from the central and peripheral nervous systems have been used for emotion recognition purposes, however, their operation and the relationship between them remains unknown. In this context, in the present work, we have tried to approach the study of the psychobiology of both systems in order to generate a computational model for the recognition of emotions in the dimension of valence. To this end, the electroencephalography (EEG) signal, electrocardiography (ECG) signal and skin temperature of 24 subjects have been studied. Each methodology has been evaluated individually, finding characteristic patterns of positive and negative emotions in each of them. After feature selection of each methodology, the results of the classification showed that, although the classification of emotions is possible at both central and peripheral levels, the multimodal approach did not improve the results obtained through the EEG alone. In addition, differences have been observed between cerebral and peripheral responses in the processing of emotions by separating the sample by sex; though, the differences between men and women were only notable at the peripheral nervous system level.
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Affiliation(s)
- Jennifer Sorinas
- The Institute of Bioengineering, University Miguel Hernandez, 03202 Elche, Spain
- Department of Electronics and Computer Technology, University of Cartagena, 30202 Cartagena, Spain;
- Correspondence: (J.S.); (E.F.)
| | - Jose Manuel Ferrández
- Department of Electronics and Computer Technology, University of Cartagena, 30202 Cartagena, Spain;
| | - Eduardo Fernandez
- The Institute of Bioengineering, University Miguel Hernandez, 03202 Elche, Spain
- Correspondence: (J.S.); (E.F.)
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Nakayama C, Fujiwara K, Sumi Y, Matsuo M, Kano M, Kadotani H. Obstructive sleep apnea screening by heart rate variability-based apnea/normal respiration discriminant model. Physiol Meas 2019; 40:125001. [PMID: 31726434 DOI: 10.1088/1361-6579/ab57be] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE Obstructive sleep apnea (OSA) is a common sleep disorder; however, most patients are undiagnosed and untreated because it is difficult for patients themselves to notice OSA in daily living. Polysomnography (PSG), which is the gold standard test for sleep disorder diagnosis, cannot be performed in many hospitals. This fact motivates us to develop a simple system for screening OSA at home. APPROACH The autonomic nervous system changes during apnea, and such changes affect heart rate variability (HRV). This work develops a new apnea screening method based on HRV analysis and machine learning technologies. An apnea/normal respiration (A/N) discriminant model is built for respiration condition estimation for every heart rate measurement, and an apnea/sleep ratio is introduced for final diagnosis. A random forest is adopted for the A/N discriminant model construction, which is trained with the PhysioNet apnea-ECG database. MAIN RESULTS The screening performance of the proposed method was evaluated by applying it to clinical PSG data. Sensitivity and specificity achieved 76% and 92%, respectively, which are comparable to existing portable sleep monitoring devices used in sleep laboratories. SIGNIFICANCE Since the proposed OSA screening method can be used more easily than existing devices, it will contribute to OSA treatment.
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Affiliation(s)
- Chikao Nakayama
- Department of Systems Science, Kyoto University, Kyoto, Japan
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Ciccone AB, Deckert JA, Schlabs CR, Tilden MJ, Herda TJ, Gallagher PM, Weir JP. Transcranial Direct Current Stimulation of the Temporal Lobe Does Not Affect High-Intensity Work Capacity. J Strength Cond Res 2019; 33:2074-2086. [PMID: 29489734 DOI: 10.1519/jsc.0000000000002561] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ciccone, AB, Deckert, JA, Schlabs, CR, Tilden, MJ, Herda, TJ, Gallagher, PM, and Weir, JP. Transcranial direct current stimulation of the temporal lobe does not affect high-intensity work capacity. J Strength Cond Res 33(8): 2074-2086, 2019-Stimulation of the left insular cortex may affect heart rate variability (HRV) and exercise effort perception. These studies investigated the effects transcranial direct current stimulation (tDCS) and electrode orientation on HRV and repeated maximal knee extensions. In study 1, after sham stimulation, anodal left temporal lobe stimulation, or anodal right temporal lobe stimulation, 10 male and 10 female subjects (age = 21.0 ± 1.5 years) completed 50 maximum isokinetic extensions at 180°·s. There was a significant effect of stimulation condition on HRV for only 1 (SD2; p = 0.037; η = 0.159) of 5 HRV metrics. There was no significant effect on isokinetic fatigue percent or isokinetic work (all p ≥ 0.278; all η ≤.065). It has been proposed that placing the cathode electrode on the shoulder may differentially affect tDCS. Therefore, in study 2, the effects of electrode orientation on tDCS-induced changes in HRV was assessed in 10 healthy females and 8 healthy males (21.6 ± 2.5 years) who completed cephalic, extracephalic, and sham trials. In the cephalic montage, the anode was placed over the left temporal lobe and the cathode was placed over right prefrontal cortex. In the extracephalic montage, the cathode was placed on the shoulder on the same side of the body as the anode. Neither cephalic nor extracephalic montages affected HRV (all p ≥ 0.152; all η ≤.105). These data suggest that anodal tDCS of the insular cortex has little effect on HRV, and does not improve high-intensity exercise performance in the current population. Therefore, anodal tDCS applied over the left temporal lobe is not recommended for high-intensity performance enhancement.
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Affiliation(s)
- Anthony B Ciccone
- Osness Human Performance Laboratories, Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, Kansas
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Belfort REAU, Treccossi SPC, Silva JLF, Pillat VG, Freitas CBN, Dos Santos L. Extended Central Tendency Measure and difference plot for heart rate variability analysis. Med Eng Phys 2019; 74:33-40. [PMID: 31611180 DOI: 10.1016/j.medengphy.2019.09.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 08/21/2019] [Accepted: 09/29/2019] [Indexed: 11/30/2022]
Abstract
Heart rate variability (HRV) is a non-invasive alternative to analyze the role of the autonomic nervous system (ANS) on heart functioning. Many tools have been developed to analyze collected cardiac data. Among them, the Central Tendency Measure (CTM) is a quantitative method for variability analysis of RR intervals. The values of the CTM must be between 0 and 1 (inclusive) for different radius, which follows the intrinsic characteristics of each time series. Using the conventional CTM, the successive differences of the time series may be calculated, and it can classify and differentiate the disturbances in the ANS involving HRV. This method was extended (e-CTM) to analyze the differences between RR interval time series. In this extension, a new parameter is added, which allows analysis of long time intervals, instead of successive and adjacent RR intervals. The ability of the e-CTM to differentiate the groups of the RR interval time series was verified with 145 RR interval time series divided into three groups: subjects with congestive heart failure, healthy subjects, and nurses during one hour of their workday. Results evidence that the new parameter added differentiates the group with pathology (and subsequent impairment of ANS) and group under stress at work (temporary impairment of ANS). These results suggest that the e-CTM is capable of detection long-term variations in the HRV according to the ANS impairment.
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Affiliation(s)
| | | | - João L F Silva
- Universidade do Vale do Paraíba, São José dos Campos, SP, Brazil
| | - Valdir G Pillat
- Universidade do Vale do Paraíba, São José dos Campos, SP, Brazil
| | | | - Laurita Dos Santos
- Scientific and Technological Institute, Universidade Brasil - Campus Itaquera, Rua Carolina Fonseca 584, Itaquera, São Paulo, SP, Brazil.
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Fractal correlations and linear analyses of heart rate variability in healthy young people with different levels of physical activity. Cardiol Young 2019; 29:1236-1242. [PMID: 31475643 DOI: 10.1017/s1047951119001793] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Changes in cardiac autonomic regulation, expressed by increased sympathetic activity and decreased heart rate variability, have an important relationship with the onset of lethal cardiac phenomena. Therefore, we aimed to evaluate the cardiac autonomic behaviour in young people according to their level of physical activity. Through the International Physical Activity Questionnaire, 55 healthy young non-smokers with no history of previous diseases and whose parents did not suffer from metabolic syndrome were assessed and divided into groups: sedentary (n=12), insufficiently active (n=16), active (n=14), and very active (n=13). We collected respiratory rate, systolic and diastolic blood pressure at rest, and body mass index. Subjects remained supine at rest, and without mental stress for 15 minutes in a controlled environment. Using a cardiofrequency meter (Polar® RS800CX), data were analysed in the time domain, frequency domain, and detrended fluctuation analysis. For the sedentary group, the mean RR and rMSSD were significantly lower, and the insufficiently active group showed higher means, but significantly only for rMSSD. The insufficiently active group showed in the detrended fluctuation analysis that α2 was significantly lower compared with the sedentary, active, and very active groups. We conclude that young, healthy, sedentary individuals present an increased heart rate and that insufficiently active individuals present a decreased fractal correlation and increased parasympathetic activity.
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Hoshi RA, Santos IS, Dantas EM, Andreão RV, Schmidt MI, Duncan BB, Mill JG, Lotufo PA, Bensenor I. Decreased heart rate variability as a predictor for diabetes-A prospective study of the Brazilian longitudinal study of adult health. Diabetes Metab Res Rev 2019; 35:e3175. [PMID: 31062488 DOI: 10.1002/dmrr.3175] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/30/2019] [Accepted: 05/01/2019] [Indexed: 12/14/2022]
Abstract
AIM To investigate whether heart rate variability (HRV) is a predictor for the incidence of diabetes in a 4-year follow-up. MATERIALS AND METHODS The HRV of 9192 participants free of diabetes was analysed in time and frequency domains and stratified based on the reference values presented in the literature. The participants were then allocated to one of three groups, according to age-specific value distributions for each HRV domain: lower than the 25th percentile, between the 25th and 75th percentiles, and higher than the 75th percentile. The association between HRV and diabetes incidence at 4-year follow-up was analysed using Poisson regression models with robust estimator. RESULTS Six hundred thirty-four participants (6.90%) developed diabetes within 4 years and five out of six HRV analysed indices showed increased relative risk of developing diabetes associated with low HRV: SDNN (RR = 1.29; 95% CI, 1.09-1.52; .003), pNN50 (RR = 1.33; 95% CI, 1.11-1.58; .001), RMSSD (RR = 1.29; 95% CI, 1.09-1.53; .004), LF (RR = 1.25; 95% CI, 1.05-1.48; .012), and HF (RR = 1.39; 95% CI, 1.16-1.63; .001). CONCLUSIONS This study suggests that both overall variability and changes in parasympathetic modulation precede the incidence of diabetes. For four HRV indices below the 25th percentile, the risk for incident diabetes was 68% higher than for those participants who presented none. We concluded that HRV is an independent risk predictor of diabetes in a 4-year period.
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Affiliation(s)
- Rosangela A Hoshi
- Center for Clinical and Epidemiological Research of University Hospital, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Itamar S Santos
- Center for Clinical and Epidemiological Research of University Hospital, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Eduardo M Dantas
- Department of Biological Sciences, Federal University of Vale do Sao Francisco, Petrolina, PE, Brazil
| | - Rodrigo V Andreão
- Department of Electrical Engineering, Federal Institute of Espirito Santo, Vitoria, ES, Brazil
| | - Maria Inês Schmidt
- Postgraduate Programme in Epidemiology, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Bruce B Duncan
- Department of Social Medicine, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - José G Mill
- Department of Physiological Sciences, Federal University of Espírito Santo, Vitoria, ES, Brazil
| | - Paulo A Lotufo
- Center for Clinical and Epidemiological Research of University Hospital, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Isabela Bensenor
- Center for Clinical and Epidemiological Research of University Hospital, University of Sao Paulo, Sao Paulo, SP, Brazil
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Byun S, Kim AY, Jang EH, Kim S, Choi KW, Yu HY, Jeon HJ. Detection of major depressive disorder from linear and nonlinear heart rate variability features during mental task protocol. Comput Biol Med 2019; 112:103381. [DOI: 10.1016/j.compbiomed.2019.103381] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 08/02/2019] [Accepted: 08/03/2019] [Indexed: 01/15/2023]
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Vanzella LM, Dagostinho DBB, Figueiredo MPFD, Castrillón CIM, Netto Junior J, Vanderlei LCM. Periodized Aerobic Interval Training Modifies Geometric Indices of Heart Rate Variability in Metabolic Syndrome. MEDICINA (KAUNAS, LITHUANIA) 2019; 55:E532. [PMID: 31454929 PMCID: PMC6780327 DOI: 10.3390/medicina55090532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 08/16/2019] [Accepted: 08/22/2019] [Indexed: 01/25/2023]
Abstract
Background: Metabolic syndrome (MetS) influences the autonomic modulation, increasing the risk of cardiovascular events, which demands the identification of effective treatments for this population. Considering this, the study has the objective of evaluating the effects of periodized aerobic interval training (AIT) on geometrical methods of heart rate variability (HRV) on individuals with MetS. Methods: 52 individuals with MetS were considered for analysis. They were divided into two groups: aerobic interval training group (AITG; n = 26) and control group (CG; n = 26). The AITG performed 16 weeks of periodized AIT. For HRV analysis, the heart rate was recorded beat-by-beat at the beginning and the end of the AIT program and geometrical methods were used for analysis. Results: significant increase was observed for triangular index (RRtri, -1.25 ± 0.58 vs. 1.41 ± 0.57), standard deviation of distances from diagonal to points (SD1, -0.13 ± 1.52 vs. 4.34 ± 1.49), and standard deviation of distances from points to lines (SD2, -2.14 ± 3.59 vs. 11.23 ± 3.52) on AITG compared to CG. Significant differences were not observed for triangular interpolation of normal heartbeats interval histogram (TINN, -4.05 ± 17.38 vs. 25.52 ± 17.03) and SD1/SD2 ratio (0.03 ± 0.02 vs. 0.00 ± 0.02). Qualitative analysis of the Poincaré plot identified increase on dispersion of both short and long-term intervals between successive heartbeats (RR interval) on AITG after the AIT program. Conclusion: geometric indices of HRV suggest an increase in cardiac autonomic modulation in individuals with MetS after 16 weeks of periodized AIT.
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Affiliation(s)
- Laís Manata Vanzella
- School of Technology and Sciences, São Paulo State University (UNESP), 19060-900 Presidente Prudente, Brazil.
| | | | | | | | - Jayme Netto Junior
- School of Technology and Sciences, São Paulo State University (UNESP), 19060-900 Presidente Prudente, Brazil
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Lee CH, Shin HW, Shin DG. Impact of Oxidative Stress on Long-Term Heart Rate Variability: Linear Versus Non-Linear Heart Rate Dynamics. Heart Lung Circ 2019; 29:1164-1173. [PMID: 31495726 DOI: 10.1016/j.hlc.2019.06.726] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 05/29/2019] [Accepted: 06/18/2019] [Indexed: 01/31/2023]
Abstract
BACKGROUND Heart rate variability (HRV) is a widely used non-invasive and quantitative marker of cardiac autonomic control. Elevated oxidative stress (OS) and reduced HRV have been proven in specific disease subsets. However, the impact of OS on the long-term heart rate dynamics of both conventional linear and non-linear origin in the general population is not known. METHODS The 24-hour ambulatory electrocardiogram recordings and plasma 8-iso-prostaglandin F2α (8-iso-PGF2α) levels as an OS marker were acquired simultaneously in 71 consecutive patients. The conventional time and frequency domain HRV parameters and non-linear parameters were measured. RESULTS The 8-iso-PGF2α is a significant determinant of most long-term conventional time and frequency domain HRV parameters and standard deviation (SD1, perpendicular to the line of identity; SD2, along the line of identity) descriptors from Poincaré plot analysis, but not of non-linear complexity and fractal parameters. Patients with a high OS burden had lower absolute low-frequency and high-frequency powers during both the night and morning periods, with a significant decrease in high-frequency power in the morning. CONCLUSIONS Oxidative stress is one of the significant determinants of the HRV. The severity of OS is reflected in the conventional time and frequency domain HRV parameters, but not in the non-linear measurements.
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Affiliation(s)
- Chan-Hee Lee
- Division of Cardiology, Department of Internal Medicine, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Republic of Korea
| | - Hyun-Woo Shin
- School of Biotechnology, Yeungnam University, Daegu, Republic of Korea
| | - Dong-Gu Shin
- Division of Cardiology, Department of Internal Medicine, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Republic of Korea.
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Nguyen Phuc Thu T, Hernández AI, Costet N, Patural H, Pichot V, Carrault G, Beuchée A. Improving methodology in heart rate variability analysis for the premature infants: Impact of the time length. PLoS One 2019; 14:e0220692. [PMID: 31398196 PMCID: PMC6688831 DOI: 10.1371/journal.pone.0220692] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 07/22/2019] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Heart rate variability (HRV) has been emerging in neonatal medicine. It may help for the early diagnosis of pathology and estimation of autonomous maturation. There is a lack of standardization and automation in the selection of the sequences to analyze and some features have not been explored in this specific population. The main objective of this study was to analyze the impact of the time length of the sequences on the estimation of linear and non-linear HRV features, including horizontal visibility graphs (HVG). METHODS HRV features were repeatedly measured with linear and non-linear methods on 2-, 5-, 10-minute sequences selected from the longest 15-min sequence and recorded on a weekly basis in 39 infants less than 31 weeks at birth. The associations between HRV measurements were analyzed through principal component analysis and k-means clustering. The effects of the time lengths on HRV measurements and post-menstrual age (PMA) were analyzed by linear mixed effect model for repeated measures. RESULTS The domains of analysis were concordant for their descriptive parameters of short (rMSSD, SD1 and HF) and long-term (SD, SD2 and LF) variability. α1 was correlated with the LF/HF and SD2/SD1. DC and AC were correlated with short-term variability estimates and significantly increased with GA and PMA. Shortening the windows of analysis increased the random measurement error for all the features and increased the bias for all but short term features and HVGs. CONCLUSION The linear and non-linear measurements of HRV are correlated each other. Shortening the windows of analysis increased the random error for all the features and increased the bias for all but short term features and HVGs. Short-term HRV can be an index for evaluating the maturation in whatever sequence length.
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Affiliation(s)
- Trang Nguyen Phuc Thu
- Laboratoire Traitement du Signal et de l’Image (LTSI – UMR 1099), Université de Rennes 1, Centre Hospitalier Universitaire de Rennes, Inserm, Rennes, France
- * E-mail:
| | - Alfredo I. Hernández
- Laboratoire Traitement du Signal et de l’Image (LTSI – UMR 1099), Université de Rennes 1, Centre Hospitalier Universitaire de Rennes, Inserm, Rennes, France
| | - Nathalie Costet
- Laboratoire Traitement du Signal et de l’Image (LTSI – UMR 1099), Université de Rennes 1, Centre Hospitalier Universitaire de Rennes, Inserm, Rennes, France
| | - Hugues Patural
- Pôle Mère-Enfants, Réanimation Néonatale – Hôpital Nord, Centre Hospitalier Universitaire Saint-Etienne, Saint-Etienne, France
- Système nerveux autonome - Epidémiologie Physiologie Ingénierie Santé (SNA-EPIS 4607), Université Jean Monnet, Saint-Etienne, France
| | - Vincent Pichot
- Système nerveux autonome - Epidémiologie Physiologie Ingénierie Santé (SNA-EPIS 4607), Université Jean Monnet, Saint-Etienne, France
| | - Guy Carrault
- Laboratoire Traitement du Signal et de l’Image (LTSI – UMR 1099), Université de Rennes 1, Centre Hospitalier Universitaire de Rennes, Inserm, Rennes, France
| | - Alain Beuchée
- Laboratoire Traitement du Signal et de l’Image (LTSI – UMR 1099), Université de Rennes 1, Centre Hospitalier Universitaire de Rennes, Inserm, Rennes, France
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Rodrigues LD, Oliveira LF, Shinoda L, Scorza CA, Faber J, Ferraz HB, Britto LRG, Scorza FA. Cardiovascular alterations in rats with Parkinsonism induced by 6-OHDA and treated with Domperidone. Sci Rep 2019; 9:8965. [PMID: 31222185 PMCID: PMC6586896 DOI: 10.1038/s41598-019-45518-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 06/10/2019] [Indexed: 01/10/2023] Open
Abstract
After Alzheimer, Parkinson disease (PD) is the most frequently occurring progressive, degenerative neurological disease. It affects both sympathetic and parasympathetic nervous systems in a variable fashion. Cardiovascular symptoms are present in almost all stages of PD and narrower heart rate variability is the earliest sign. Administration of Levodopa to PD patients has proven to provide some degree of neurological protection. This drug, however, causes side effects including nausea and vomiting, lessened by the administration of domperidone. Autopsies in PD patients led some researchers to suggest the involvement of the ventricular arrhythmia induced by domperidone. The aim of the present study was to determine the impact of the adjusted human maximal dose of domperidone, on cardiological features of Wistar rats. domperidone was administered to both 6-hydroxydopamine Parkinsonism models and regular Wistar rats. Quantitative analysis of ranges of heart beat variation showed significant abnormal distribution in both groups receiving domperidone as compared with respective sham counterparts. However, qualitative analysis of Poincaré plots showed that 6-hydroxydopamine Parkinsonism models receiving domperidone had the narrowest full range of heart beat and the worst distribution heart beat ranges as compared with all study groups corroborating with previous suggestion that domperidone administration to PD patients is likely to play a role in sudden unexpected death in this group of patients.
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Affiliation(s)
- Laís D Rodrigues
- Department of Neurology and Neurosurgery, UNIFESP/EPM, São Paulo, Brazil.
| | - Leandro F Oliveira
- Department of Neurology and Neurosurgery, UNIFESP/EPM, São Paulo, Brazil.
| | - Lucas Shinoda
- Department of Neurology and Neurosurgery, UNIFESP/EPM, São Paulo, Brazil
| | - Carla A Scorza
- Department of Neurology and Neurosurgery, UNIFESP/EPM, São Paulo, Brazil
| | - Jean Faber
- Department of Neurology and Neurosurgery, UNIFESP/EPM, São Paulo, Brazil
| | - Henrique B Ferraz
- Department of Neurology and Neurosurgery, UNIFESP/EPM, São Paulo, Brazil
| | - Luiz R G Britto
- Laboratory of Cellular Neurobiology, Department of Physiology and Biophysics -University of São Paulo, São Paulo, Brazil
| | - Fulvio A Scorza
- Department of Neurology and Neurosurgery, UNIFESP/EPM, São Paulo, Brazil
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Novel gridded descriptors of poincaré plot for analyzing heartbeat interval time-series. Comput Biol Med 2019; 109:280-289. [DOI: 10.1016/j.compbiomed.2019.04.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 04/18/2019] [Accepted: 04/18/2019] [Indexed: 01/23/2023]
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Delliaux S, Delaforge A, Deharo JC, Chaumet G. Mental Workload Alters Heart Rate Variability, Lowering Non-linear Dynamics. Front Physiol 2019; 10:565. [PMID: 31156454 PMCID: PMC6528181 DOI: 10.3389/fphys.2019.00565] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 04/24/2019] [Indexed: 01/06/2023] Open
Abstract
Mental workload is known to alter cardiovascular function leading to increased cardiovascular risk. Nevertheless, there is no clear autonomic nervous system unbalance to be quantified during mental stress. We aimed to characterize the mental workload impact on the cardiovascular function with a focus on heart rate variability (HRV) non-linear indexes. A 1-h computerized switching task (letter recognition) was performed by 24 subjects while monitoring their performance (accuracy, response time), electrocardiogram and blood pressure waveform (finger volume clamp method). The HRV was evaluated from the beat-to-beat RR intervals (RRI) in time-, frequency-, and informational- domains, before (Control) and during the task. The task induced a significant mental workload (visual analog scale of fatigue from 27 ± 26 to 50 ± 31 mm, p < 0.001, and NASA-TLX score of 56 ± 17). The heart rate, blood pressure and baroreflex function were unchanged, whereas most of the HRV parameters markedly decreased. The maximum decrease occurred during the first 15 min of the task (P1), before starting to return to the baseline values reached at the end of the task (P4). The RRI dimension correlation (D2) decrease was the most significant (P1 vs. Control: 1.42 ± 0.85 vs. 2.21 ± 0.8, p < 0.001) and only D2 lasted until the task ended (P4 vs. Control: 1.96 ± 0.9 vs. 2.21 ± 0.9, p < 0.05). D2 was identified as the most robust cardiovascular variable impacted by the mental workload as determined by posterior predictive simulations (p = 0.9). The Spearman correlation matrix highlighted that D2 could be a marker of the generated frustration (R = -0.61, p < 0.01) induced by a mental task, as well as the myocardial oxygen consumption changes assessed by the double product (R = -0.53, p < 0.05). In conclusion, we showed that mental workload sharply lowered the non-linear RRI dynamics, particularly the RRI correlation dimension.
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Affiliation(s)
- Stéphane Delliaux
- Aix Marseille Univ, INSERM, INRA, C2VN, Marseille, France
- Pôle Cardio-Vasculaire et Thoracique, Service des Explorations Fonctionnelles Respiratoires, AP-HM, Hôpital Nord, Marseille, France
| | - Alexis Delaforge
- Service de Médecine et Santé au Travail, AP-HM, Hôpital de la Timone, Marseille, France
| | - Jean-Claude Deharo
- Aix Marseille Univ, INSERM, INRA, C2VN, Marseille, France
- Pôle Cardio-Vasculaire et Thoracique, Service de Cardiologie, AP-HM, Hôpital de la Timone, Marseille, France
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Bhogal AS, De Rui M, Pavanello D, El-Azizi I, Rowshan S, Amodio P, Montagnese S, Mani AR. Which heart rate variability index is an independent predictor of mortality in cirrhosis? Dig Liver Dis 2019; 51:695-702. [PMID: 30293892 DOI: 10.1016/j.dld.2018.09.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 08/29/2018] [Accepted: 09/11/2018] [Indexed: 02/09/2023]
Abstract
BACKGROUND Liver cirrhosis is associated with reduced heart rate variability (HRV), which indicates impaired integrity of cardiovascular control in this patient population. There are several different indices for HRV quantification. The present study was designed to: 1) determine which of the HRV indices is best at predicting mortality in patients with cirrhosis; 2) verify if such ability to predict mortality is independent of the severity of hepatic failure. METHODS Ten minutes electrocardiogram was recorded in 74 patients with cirrhosis. Heart rate fluctuations were quantified using statistical, geometrical and non-linear analysis. The patients were followed-up for 18months and information was collected on the occurrence of death/liver transplantation. RESULTS During the follow-up period, 24 patients (32%) died or were transplanted for hepatic decompensation. Cox's regression analysis showed that SDNN (total HRV), cSDNN (corrected SDNN), SD1 (short-term HRV), SD2 (long-terms HRV) and spectral indices could predict survival in these patients. However, only SD2 and cSDNN were shown to be independent of MELD in predicting survival. The prognostic value of HRV indices was independent of age, gender, use of beta blockers, and the aetiology of liver disease. CONCLUSION Two HRV indices were identified that could predict mortality in patients with cirrhosis, independently of MELD. These indices are potentially useful tools for survival prediction.
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Affiliation(s)
- Amar S Bhogal
- Division of Medicine, University College London, London, UK
| | - Michele De Rui
- Department of Medicine, University of Padova, Padova, Italy
| | | | - Ilias El-Azizi
- Division of Medicine, University College London, London, UK
| | - Sadia Rowshan
- Division of Medicine, University College London, London, UK
| | - Piero Amodio
- Department of Medicine, University of Padova, Padova, Italy
| | - Sara Montagnese
- Department of Medicine, University of Padova, Padova, Italy.
| | - Ali R Mani
- Division of Medicine, University College London, London, UK.
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Buendia R, Forcolin F, Karlsson J, Arne Sjöqvist B, Anund A, Candefjord S. Deriving heart rate variability indices from cardiac monitoring-An indicator of driver sleepiness. TRAFFIC INJURY PREVENTION 2019; 20:249-254. [PMID: 30978124 DOI: 10.1080/15389588.2018.1548766] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 11/05/2018] [Accepted: 11/12/2018] [Indexed: 06/09/2023]
Abstract
Objective: Driver fatigue is considered to be a major contributor to road traffic crashes. Cardiac monitoring and heart rate variability (HRV) analysis is a candidate method for early and accurate detection of driver sleepiness. This study has 2 objectives: to evaluate the (1) suitability of different preprocessing strategies for detecting and removing outlier heartbeats and spectral transformation of HRV signals and their impact of driver sleepiness assessment and (2) relation between common HRV indices and subjective sleepiness reported by a large number of drivers in real driving situations, for the first time. Methods: The study analyzed >3,500 5-min driving epochs from 76 drivers on a public motorway in Sweden. The electrocardiograph (ECG) data were recorded in 3 studies designed to evaluate the physiological differences between awake and sleepy drivers. The drivers reported their perceived level of sleepiness according to the Karolinska Sleepiness Scale (KSS) every 5 min. Two standard methods were used for identifying outlier heartbeats: (1) percentage change (PC), where outliers were defined as interbeat intervals deviating >30% from the mean of the four previous intervals and (2) standard deviation (SD), where outliers were defined as interbeat interval deviating >4 SD from the mean interval duration in the current epoch. Three standard methods were used for spectral transformation, which is needed for deriving HRV indices in the frequency domain: (1) Fourier transform; (2) autoregressive model; and (3) Lomb-Scargle periodogram. Different preprocessing strategies were compared regarding their impact on derivation of common HRV indices and their relation to KSS data distribution, using box plots and statistical tests such as analysis of variance (ANOVA) and Student's t test. Results: The ability of HRV indices to discriminate between alert and sleepy drivers does not differ significantly depending on which outlier detection and spectral transformation methods are used. As expected, with increasing sleepiness, the heart rate decreased, whereas heart rate variability overall increased. Furthermore, HRV parameters representing the parasympathetic branch of the autonomous nervous system increased. An unexpected finding was that parameters representing the sympathetic branch of the autonomous nervous system also increased with increasing KSS level. We hypothesize that this increment was due to stress induced by trying to avoid an incident, because the drivers were in real driving situations. Conclusions: The association of HRV indices to KSS did not depend on the preprocessing strategy. No preprocessing method showed superiority for HRV association to driver sleepiness. This was also true for combinations of methods for frequency domain HRV indices. The results prove clear relationships between HRV indices and perceived sleepiness. Thus, HRV analysis shows promise for driver sleepiness detection.
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Affiliation(s)
- Ruben Buendia
- a SAFER Vehicle and Traffic Safety Centre , Chalmers University of Technology , Gothenburg , Sweden
- b Department of Electrical Engineering , Chalmers University of Technology , Gothenburg , Sweden
- c MedTech West , Gothenburg , Sweden
- d Department of IT , University of Borås , Borås , Sweden
| | - Fabio Forcolin
- a SAFER Vehicle and Traffic Safety Centre , Chalmers University of Technology , Gothenburg , Sweden
- b Department of Electrical Engineering , Chalmers University of Technology , Gothenburg , Sweden
| | - Johan Karlsson
- e Autoliv Research, Autoliv Development AB , Vårgårda , Sweden
| | - Bengt Arne Sjöqvist
- a SAFER Vehicle and Traffic Safety Centre , Chalmers University of Technology , Gothenburg , Sweden
- b Department of Electrical Engineering , Chalmers University of Technology , Gothenburg , Sweden
- c MedTech West , Gothenburg , Sweden
| | - Anna Anund
- f The Swedish National Road and Transport Research Institute (VTI) , Linköping , Sweden
| | - Stefan Candefjord
- a SAFER Vehicle and Traffic Safety Centre , Chalmers University of Technology , Gothenburg , Sweden
- b Department of Electrical Engineering , Chalmers University of Technology , Gothenburg , Sweden
- c MedTech West , Gothenburg , Sweden
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Mashhadimalek M, Jafarnia Dabanloo N, Gharibzadeh S. Is It Possible to Determine the Level of Spiritual Well-Being by Measuring Heart Rate Variability During the Reading of Heavenly Books? Appl Psychophysiol Biofeedback 2019; 44:185-193. [DOI: 10.1007/s10484-019-09433-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Poincaré plot analysis of cerebral blood flow signals: Feature extraction and classification methods for apnea detection. PLoS One 2018; 13:e0208642. [PMID: 30532232 PMCID: PMC6286008 DOI: 10.1371/journal.pone.0208642] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 11/20/2018] [Indexed: 02/01/2023] Open
Abstract
OBJECTIVE Rheoencephalography is a simple and inexpensive technique for cerebral blood flow assessment, however, it is not used in clinical practice since its correlation to clinical conditions has not yet been extensively proved. The present study investigates the ability of Poincaré Plot descriptors from rheoencephalography signals to detect apneas in volunteers. METHODS A group of 16 subjects participated in the study. Rheoencephalography data from baseline and apnea periods were recorded and Poincaré Plot descriptors were extracted from the reconstructed attractors with different time lags (τ). Among the set of extracted features, those presenting significant differences between baseline and apnea recordings were used as inputs to four different classifiers to optimize the apnea detection. RESULTS Three features showed significant differences between apnea and baseline signals: the Poincaré Plot ratio (SDratio), its correlation (R) and the Complex Correlation Measure (CCM). Those differences were optimized for time lags smaller than those recommended in previous works for other biomedical signals, all of them being lower than the threshold established by the position of the inflection point in the CCM curves. The classifier showing the best performance was the classification tree, with 81% accuracy and an area under the curve of the receiver operating characteristic of 0.927. This performance was obtained using a single input parameter, either SDratio or R. CONCLUSIONS Poincaré Plot features extracted from the attractors of rheoencephalographic signals were able to track cerebral blood flow changes provoked by breath holding. Even though further validation with independent datasets is needed, those results suggest that nonlinear analysis of rheoencephalography might be a useful approach to assess the correlation of cerebral impedance with clinical changes.
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Rahman S, Habel M, Contrada RJ. Poincaré plot indices as measures of sympathetic cardiac regulation: Responses to psychological stress and associations with pre-ejection period. Int J Psychophysiol 2018; 133:79-90. [DOI: 10.1016/j.ijpsycho.2018.08.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 06/19/2018] [Accepted: 08/09/2018] [Indexed: 12/29/2022]
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Mantovani Junior N, Pizzo Junior E, Dos Santos Siqueira M, de Souza Cavina AP, Pastre CM, Marques Vanderlei F. Effects of massage as a recuperative technique on autonomic modulation of heart rate and cardiorespiratory parameters: a study protocol for a randomized clinical trial. Trials 2018; 19:459. [PMID: 30144819 PMCID: PMC6109286 DOI: 10.1186/s13063-018-2830-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 08/01/2018] [Indexed: 11/30/2022] Open
Abstract
Background Recuperative techniques have been used to anticipate and potentiate recovery. The massage is one of the most widely used in sports. Among the ways to demonstrate the recovery of the organism is the resumption of autonomic modulation of heart rate, which can be analyzed in situations that cause disturbances in the behavior of the cardiovascular system with the objective of verifying the responsiveness of the autonomic nervous system (ANS). Recovery can be assessed through heart rate variability (HRV) which analyzes the oscillations in consecutive heartbeats, thus allowing an important non-invasive alternative for the study of modulation of the ANS. The objective of the study will be to measure the effects of massage as a recuperative technique on the autonomic modulation of heart rate and cardiorespiratory parameters at different moments of application. Methods This is a randomized, cross-over clinical trial. Forty men aged 18 to 30 years, healthy and physically active according to the International Physical Activity Questionnaire will participate in the study. Participants will be randomized into groups, which will perform the five interventions of the study at randomized moments, one intervention per session: Intervention 1: control; Intervention 2: participants will receive the massage protocol; Intervention 3: performance of the stress protocol; Intervention 4: participants will perform the stress protocol and immediately after receive the massage; Intervention 5: participants will perform the stress protocol and 1 h after conclusion of the protocol will receive the massage. The sessions will occur with an interval of 1 week between them and, due to the technique used, blinding participants and therapists is not possible. The primary outcome measure is HRV that will be measured 2 h after the conclusion of each intervention, and secondary outcome measures, which include heart rate, respiratory rate, blood pressure, oxygen saturation, and individual touch perception, will be measured at specific moments in the course of each intervention. Discussion The implementation and use of this standardized protocol should provide important and reliable information regarding the use of massage in post-exercise recovery, with the identification of its effects on the ANS and the best timing and form of massage application. The data obtained in the present study will provide subsidies for the best management of application of the technique in sports clinical practice, considering periods of training and, mainly, of competitions. Trial registration ClinicalTrials.gov, ID:NCT03094676. Pre-results. 12 March 2018. Electronic supplementary material The online version of this article (10.1186/s13063-018-2830-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Nilton Mantovani Junior
- Postgraduate Program in Physiotherapy, Universidade Estadual Paulista (FCT/UNESP), Presidente Prudente, São Paulo, Brazil
| | - Eduardo Pizzo Junior
- Graduation in Physiotherapy, Universidade Estadual Paulista (FCT/UNESP), Presidente Prudente, São Paulo, Brazil
| | - Malu Dos Santos Siqueira
- Postgraduate Program in Physiotherapy, Universidade Estadual Paulista (FCT/UNESP), Presidente Prudente, São Paulo, Brazil
| | | | - Carlos Marcelo Pastre
- Postgraduate Program in Physiotherapy, Universidade Estadual Paulista (FCT/UNESP), Presidente Prudente, São Paulo, Brazil.,Department of Physiotherapy, Universidade Estadual Paulista (FCT/UNESP), Presidente Prudente, São Paulo, Brazil
| | - Franciele Marques Vanderlei
- Postgraduate Program in Physiotherapy, Universidade Estadual Paulista (FCT/UNESP), Presidente Prudente, São Paulo, Brazil. .,Department of Physiotherapy, Universidade Estadual Paulista (FCT/UNESP), Presidente Prudente, São Paulo, Brazil.
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Rodriguez J, Voss A, Caminal P, Bayes-Genis A, Giraldo BF. Characterization and classification of patients with different levels of cardiac death risk by using Poincaré plot analysis. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2018; 2017:1332-1335. [PMID: 29060122 DOI: 10.1109/embc.2017.8037078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Cardiac death risk is still a big problem by an important part of the population, especially in elderly patients. In this study, we propose to characterize and analyze the cardiovascular and cardiorespiratory systems using the Poincaré plot. A total of 46 cardiomyopathy patients and 36 healthy subjets were analyzed. Left ventricular ejection fraction (LVEF) was used to stratify patients with low risk (LR: LVEF > 35%, 16 patients), and high risk (HR: LVEF ≤ 35%, 30 patients) of heart attack. RR, SBP and TTot time series were extracted from the ECG, blood pressure and respiratory flow signals, respectively. Parameters that describe the scatterplott of Poincaré method, related to short- and long-term variabilities, acceleration and deceleration of the dynamic system, and the complex correlation index were extracted. The linear discriminant analysis (LDA) and the support vector machines (SVM) classification methods were used to analyze the results of the extracted parameters. The results showed that cardiac parameters were the best to discriminate between HR and LR groups, especially the complex correlation index (p = 0.009). Analising the interaction, the best result was obtained with the relation between the difference of the standard deviation of the cardiac and respiratory system (p = 0.003). When comparing HR vs LR groups, the best classification was obtained applying SVM method, using an ANOVA kernel, with an accuracy of 98.12%. An accuracy of 97.01% was obtained by comparing patients versus healthy, with a SVM classifier and Laplacian kernel. The morphology of Poincaré plot introduces parameters that allow the characterization of the cardiorespiratory system dynamics.
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71
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Harrison TM, Brown R. Autonomic Nervous System Function After a Skin-to-Skin Contact Intervention in Infants With Congenital Heart Disease. J Cardiovasc Nurs 2018; 32:E1-E13. [PMID: 28181926 PMCID: PMC5816978 DOI: 10.1097/jcn.0000000000000397] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Infants with complex congenital heart disease (CCHD) demonstrate impaired autonomic nervous system (ANS) regulation, which may contribute to commonly observed impairments in feeding, growth, and development. Close mother-infant physical contact improves ANS function in other high-risk infant populations. OBJECTIVE Our purposes were to examine feasibility of a 2-week daily skin-to-skin contact (SSC) intervention and to describe change in ANS function in response to the intervention. METHODS Feasibility was assessed by recruitment and retention rates, safety, and acceptability. Autonomic nervous system function was measured with linear and nonlinear measures of heart rate variability (HRV) during a feeding before the 14-day SSC intervention and 3 times during a 4-week follow-up. RESULTS Recruitment rate was 72%; retention rate was 55.5%. Mothers were universally positive about SSC. Ten mothers and infants completed a daily mean of 77.05 minutes of SSC during the 14-day intervention with no adverse events. Baseline high-frequency HRV, reactivity to challenge, and recovery after challenge improved during the 6-week study. Nonlinear measures demonstrated abnormally high sympathetic activity, especially after feeding, in most infants. CONCLUSIONS Skin-to-skin contact is feasible in infants with CCHD. Linear measures of HRV suggested improvements in ANS function with this intervention. This article is one of the first to describe nonlinear HRV measures in infants with CCHD. Additional research is needed to identify variations in linear and nonlinear effects based on specific cardiac conditions and with varying intervention doses and timing. This low-cost, low-risk intervention has the potential to improve outcomes in infants with CCHD.
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Affiliation(s)
- Tondi M Harrison
- Tondi M. Harrison, PhD, RN, CPNP, FAAN Assistant Professor, Center for Women, Children, and Youth, The Ohio State University College of Nursing, Columbus. Roger Brown, PhD Professor of Research Methodology and Statistics, University of Wisconsin-Madison School of Nursing; and CEO Medical Research Consulting, Madison, Wisconsin
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Heart Rate Variability and Cardiopulmonary Dysfunction in Patients with Duchenne Muscular Dystrophy: A Systematic Review. Pediatr Cardiol 2018; 39:869-883. [PMID: 29696428 DOI: 10.1007/s00246-018-1881-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 04/04/2018] [Indexed: 01/16/2023]
Abstract
Duchenne muscular dystrophy (DMD) is a genetic recessive disorder with progressive muscle weakness. Despite the general muscle wasting, degeneration and necrosis of cardiomyocytes have been the main causes of morbidity and death in individuals with DMD. Cardiac failure is generally preceded by disturbances in heart rate variability (HRV), and non-invasive measurement of the autonomic nervous system has been an important tool to predict adverse cardiovascular events. Hence, the application of HRV to study autonomic modulation in DMD individuals, and the establishment of correlations between HRV and heart/lung diseases, age, and mortality will have the potential to improve quality of life and life expectancy of individuals with DMD. In order to evaluate the state of the art in this field, we conducted a systematic search in Medline/PubMed and BVS (virtual library in health) databases. We selected 8 studies using pre-defined criteria and meta-analysis revealed decreased parasympathetic activity and increased sympathetic predominance in individuals with DMD as major observations. Moreover, there is a strong association between diminished HRV and myocardial fibrosis with DMD. These patterns are evident in patients at early-stage DMD and become more prominent as disease severity and age increase. Thus, data minning clearly indicates that HRV assessment can be used as a predictor for sudden death in individuals with DMD. The use of the HRV, which is inexpensive, ubiquitously available in clinics and hospitals, and a non-invasive analysis tool, can save lives and decrease the morbity in DMD by alerting care givers to consider autonomic nervous system intervention.
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Moon J, Choi KH, Park JH, Song TJ, Choi YS, Kim JH, Kim HJ, Lee HW. Sympathetic Overactivity Based on Heart-Rate Variability in Patients with Obstructive Sleep Apnea and Cerebral Small-Vessel Disease. J Clin Neurol 2018; 14:310-319. [PMID: 29856154 PMCID: PMC6032004 DOI: 10.3988/jcn.2018.14.3.310] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 01/22/2018] [Accepted: 01/25/2018] [Indexed: 12/14/2022] Open
Abstract
Background and Purpose Obstructive sleep apnea (OSA) is associated with cerebral white-matter changes (WMC), but the underlying mechanisms are not completely understood. Our aim was to identify the cardiovascular autonomic characteristics during sleep that are associated with cerebral WMC in OSA patients. Methods We recruited subjects from our sleep-center database who underwent both polysomnography and brain MRI within a 1-year period. Sixty patients who had OSA with WMC (OSA+WMC), 44 patients who had OSA without WMC (OSA−WMC), and 31 control subjects who had neither OSA nor WMC were analyzed. Linear and nonlinear indices of heart-rate variability (HRV) were analyzed in each group according to different sleep stages and also over the entire sleeping period. Results Among the nonlinear HRV indices, the Poincaré ratio (SD12) during the entire sleep period was significantly increased in the OSA+WMC group, even after age adjustment. Meanwhile, detrended fluctuation analysis 1 during non-rapid-eye-movement sleep tended to be lowest in the OSA+WMC group. These indices were altered regardless of the presence of hypertension or diabetes. In the subgroup analysis of middle-aged OSA patients, approximate entropy during rapid-eye-movement sleep was significantly lower in OSA+WMC patients than in OSA−WMC patients. Overall, the nonlinear HRV indices suggest that sympathetic activity was higher in the OSA+WMC group than in the OSA−WMC and control groups. Conclusions Our findings suggest that dysregulation of HRV, especially overactivation of sympathetic tone, could be a pathophysiologic mechanism underlying the development of WMC in OSA patients.
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Affiliation(s)
- Jangsup Moon
- Department of Neurology, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea.,Department of Medical Science, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea.,Department of Neurology, Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
| | - Kang Hyun Choi
- Department of Neurology, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea.,Department of Medical Science, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea
| | - Jung Hyun Park
- Department of Neurology, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea.,Department of Neurology, Heavenly Hospital, Goyang, Korea
| | - Tae Jin Song
- Department of Neurology, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea
| | - Yun Seo Choi
- Department of Medical Science, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea
| | - Ju Hee Kim
- Department of Medical Science, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea
| | - Hyeon Jin Kim
- Department of Neurology, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea.,Department of Medical Science, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea
| | - Hyang Woon Lee
- Department of Neurology, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea.,Department of Medical Science, Ewha Womans University School of Medicine and Ewha Medical Research Institute, Seoul, Korea.
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Blake R, Shaw D, Culshaw G, Martinez-Pereira Y. Poincaré plots as a measure of heart rate variability in healthy dogs. J Vet Cardiol 2018; 20:20-32. [DOI: 10.1016/j.jvc.2017.10.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/22/2017] [Accepted: 10/25/2017] [Indexed: 11/25/2022]
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de Rezende Barbosa MPDC, Vanderlei LCM, Neves LM, Takahashi C, Torquato PRDS, Fortaleza ACDS, Freitas Júnior IF, Sorpreso ICE, Abreu LC, Pérez Riera AR. Impact of functional training on geometric indices and fractal correlation property of heart rate variability in postmenopausal women. Ann Noninvasive Electrocardiol 2018; 23:e12469. [PMID: 28741870 PMCID: PMC6931770 DOI: 10.1111/anec.12469] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 04/17/2017] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND To evaluate the influence of functional training on the geometric indices of heart rate variability (HRV) and fractal correlation properties of the dynamics of heart rate in menopausal women. METHODS Of 39 women who were in the period of menopause for more than a year and who did not practice any regular physical activity were divided into: Functional training group (FTG = 50 ± 4.5 years; 67.64 ± 11.64 kg; 1.5 ± 0.05 m) that executed the functional training (FT) and all proposals by reviews and the Control group (58.45 ± 4.8 years; 66.91 ± 13.24 kg; 1.55 ± 0.05 m) who performed all assessments but not FT. The training consisted of 18 weeks (three times a week) and the volunteers performed three sets of 11 functional exercises followed by a walk in each of the sessions. The autonomic nervous system modulation was evaluated by analysis of HRV and the indices obtained were: RR intervals, RRTRI, TINN, SD1, SD2, SD1/SD2, qualitative analysis of Poincaré plot and DFA (alfa-1, alfa-2 and alfa-1/alfa-2). The Student's t-test for unpaired samples (normal data) or Mann-Whitney test nonnormal data) were used to compare the differences obtained between the final moment and the initial moment of the studied groups (p < .05). CONCLUSION Were observed in the FTG: increased SD1 (CG 0.13 ± 4.00 vs. 3.60 ± 8.43), beat-to-beat global dispersion much greater as an increased in the dispersion of long-term RR intervals and increased fractal properties of short-term (α1) (CG -0.04 ± 0.13 vs. 0.07 ± 0.21). FT promoted a beneficial impact on cardiac autonomic modulation, characterized by increased parasympathetic activity and short-term fractal properties of the dynamics of the heart rate.
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Affiliation(s)
| | - Luiz C. M. Vanderlei
- Physiotherapy DepartmentSão Paulo State University – FCT/UNESPPresidente PrudenteSPBrazil
| | | | - Carolina Takahashi
- Physiotherapy DepartmentSão Paulo State University – FCT/UNESPPresidente PrudenteSPBrazil
| | | | | | | | - Isabel C. E. Sorpreso
- Medicine FacultyObstetrics and Gynecology DepartmentUniversity of São Paulo (USP)São PauloBrazil
| | - Luiz C. Abreu
- ABC Medical School (FMABC)Santo AndréSão PauloBrazil
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Hauck M, Schröder S, Meyer-Hamme G, Lorenz J, Friedrichs S, Nolte G, Gerloff C, Engel AK. Acupuncture analgesia involves modulation of pain-induced gamma oscillations and cortical network connectivity. Sci Rep 2017; 7:16307. [PMID: 29176684 PMCID: PMC5701238 DOI: 10.1038/s41598-017-13633-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 09/22/2017] [Indexed: 11/30/2022] Open
Abstract
Recent studies support the view that cortical sensory, limbic and executive networks and the autonomic nervous system might interact in distinct manners under the influence of acupuncture to modulate pain. We performed a double-blind crossover design study to investigate subjective ratings, EEG and ECG following experimental laser pain under the influence of sham and verum acupuncture in 26 healthy volunteers. We analyzed neuronal oscillations and inter-regional coherence in the gamma band of 128-channel-EEG recordings as well as heart rate variability (HRV) on two experimental days. Pain ratings and pain-induced gamma oscillations together with vagally-mediated power in the high-frequency bandwidth (vmHF) of HRV decreased significantly stronger during verum than sham acupuncture. Gamma oscillations were localized in the prefrontal cortex (PFC), mid-cingulate cortex (MCC), primary somatosensory cortex and insula. Reductions of pain ratings and vmHF-power were significantly correlated with increase of connectivity between the insula and MCC. In contrast, connectivity between left and right PFC and between PFC and insula correlated positively with vmHF-power without a relationship to acupuncture analgesia. Overall, these findings highlight the influence of the insula in integrating activity in limbic-saliency networks with vagally mediated homeostatic control to mediate antinociception under the influence of acupuncture.
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Affiliation(s)
- Michael Hauck
- Department of Neurophysiology and Pathophysiology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany.,Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Sven Schröder
- HanseMerkur Center for Traditional Chinese Medicine at the University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany.
| | - Gesa Meyer-Hamme
- HanseMerkur Center for Traditional Chinese Medicine at the University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Jürgen Lorenz
- Faculty of Life Science, Laboratory of Human Biology and Physiology, Applied Science University, 21033, Hamburg, Germany
| | - Sunja Friedrichs
- Department of Neurophysiology and Pathophysiology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany.,HanseMerkur Center for Traditional Chinese Medicine at the University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Guido Nolte
- Department of Neurophysiology and Pathophysiology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Christian Gerloff
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Andreas K Engel
- Department of Neurophysiology and Pathophysiology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
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Patel HC, Hayward C, Wardle AJ, Middleton L, Lyon AR, Di Mario C, Salukhe TV, Sutton R, Rosen SD. The effect of head-up tilt upon markers of heart rate variability in patients with atrial fibrillation. Ann Noninvasive Electrocardiol 2017; 23:e12511. [PMID: 29034583 DOI: 10.1111/anec.12511] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Accepted: 09/21/2017] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Heart rate variability (HRV) analysis is uncommonly undertaken in patients with atrial fibrillation (AF) due to an assumption that ventricular response is random. We sought to determine the effects of head-up tilt (HUT), a stimulus known to elicit an autonomic response, on HRV in patients with AF; we contrasted the findings with those of patients in sinus rhythm (SR). METHODS Consecutive, clinically indicated tilt tests were examined for 207 patients: 176 in SR, 31 in AF. Patients in AF were compared to an age-matched SR cohort (n = 69). Five minute windows immediately before and after tilting were analyzed using time-domain, frequency-domain and nonlinear HRV parameters. Continuous, noninvasive assessment of blood pressure, heart rate and stroke volume were available in the majority of patients. RESULTS There were significant differences at baseline in all HRV parameters between AF and age matched SR. HUT produced significant hemodynamic changes, regardless of cardiac rhythm. Coincident with these hemodynamic changes, patients in AF had a significant increase in median [quartile 1, 2] DFA-α2 (+0.14 [-0.03, 0.32], p < .005) and a decrease in sample entropy (-0.17 [-0.50, -0.01], p < .005). CONCLUSION In the SR cohort, increasing age was associated with fewer HRV changes on tilting. Patients with AF had blunted HRV responses to tilting, mirroring those seen in an age matched SR group. It is feasible to measure HRV in patients with AF and the changes observed on HUT are comparable to those seen in patients in sinus rhythm.
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Affiliation(s)
- Hitesh C Patel
- NIHR Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom.,National Heart and Lung Institute, Imperial College, London, United Kingdom
| | - Carl Hayward
- NIHR Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom.,National Heart and Lung Institute, Imperial College, London, United Kingdom
| | | | - Lee Middleton
- Department of Cardiology, Ealing Hospital, Southall, United Kingdom
| | - Alexander R Lyon
- NIHR Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom.,National Heart and Lung Institute, Imperial College, London, United Kingdom
| | - Carlo Di Mario
- NIHR Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom.,National Heart and Lung Institute, Imperial College, London, United Kingdom
| | - Tushar V Salukhe
- NIHR Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, United Kingdom.,National Heart and Lung Institute, Imperial College, London, United Kingdom
| | - Richard Sutton
- National Heart and Lung Institute, Imperial College, London, United Kingdom
| | - Stuart D Rosen
- National Heart and Lung Institute, Imperial College, London, United Kingdom.,Department of Cardiology, Ealing Hospital, Southall, United Kingdom
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78
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Constantinescu V, Matei D, Costache V, Cuciureanu D, Arsenescu-Georgescu C. Linear and nonlinear parameters of heart rate variability in ischemic stroke patients. Neurol Neurochir Pol 2017; 52:194-206. [PMID: 29110883 DOI: 10.1016/j.pjnns.2017.10.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 09/22/2017] [Accepted: 10/03/2017] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Cardiovascular system presents cortical modulation. Post-stroke outcome can be highly influenced by autonomic nervous system disruption. Heart rate variability (HRV) analysis is a simple non-invasive method to assess sympatho-vagal balance. OBJECTIVES The purpose of this study was to investigate cardiac autonomic activity in ischemic stroke patients and to asses HRV nonlinear parameters beside linear ones. METHODS We analyzed HRV parameters in 15 right and 15 left middle cerebral artery ischemic stroke patients, in rest condition and during challenge (standing and deep breathing). Data were compared with 15 age- and sex-matched healthy controls. RESULTS There was an asymmetric response after autonomic stimulation tests depending on the cortical lateralization in ischemic stroke patients. In resting state, left hemisphere stroke patients presented enhanced parasympathetic control of the heart rate (higher values for RMSSD, pNN50 and HF in normalized units). Right hemisphere ischemic stroke patients displayed a reduced cardiac parasympathetic modulation during deep breathing test. Beside time and frequency domain, using short-term ECG monitoring, cardiac parasympathetic modulation can also be assessed by nonlinear parameter SD1, that presented strong positive correlation with time and frequency domain parameters RMSSD, pNN50, HFnu, while DFA α1 index presented negative correlation with the same indices and positive correlation with the LFnu and LF/HF ratio, indicating a positive association with the sympatho-vagal balance. CONCLUSIONS Cardiac monitoring in clinical routine using HRV analysis in order to identify autonomic imbalance may highlight cardiac dysfunctions, thus helping preventing potential cardiovascular complications, especially in right hemisphere ischemic stroke patients with sympathetic hyperactivation.
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Affiliation(s)
- V Constantinescu
- Neurology Department, Faculty of Medicine, University of Medicine and Pharmacy, No 16, University Street, Iasi 700115, Romania(1)
| | - D Matei
- Department of Biomedical Sciences, Faculty of Medical Bioengineering, University of Medicine and Pharmacy, No 16, University Street, Iasi 700115, Romania.
| | - V Costache
- Cardiovascular Surgery Department, University "L. Blaga", Faculty of Medicine, No 2A, Lucian Blaga Street, Sibiu 550169, Romania
| | - D Cuciureanu
- Neurology Department, Faculty of Medicine, University of Medicine and Pharmacy, No 16, University Street, Iasi 700115, Romania(1)
| | - C Arsenescu-Georgescu
- Cardiology Department, Faculty of Medicine, University of Medicine and Pharmacy, No 16, University Street, Iasi 700115, Romania
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79
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Huvanandana J, Thamrin C, Tracy MB, Hinder M, Nguyen CD, McEwan AL. Advanced analyses of physiological signals in the neonatal intensive care unit. Physiol Meas 2017; 38:R253-R279. [DOI: 10.1088/1361-6579/aa8a13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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80
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Rezaei M, Mohammadi H, Khazaie H. EEG/EOG/EMG data from a cross sectional study on psychophysiological insomnia and normal sleep subjects. Data Brief 2017; 15:314-319. [PMID: 29214192 PMCID: PMC5712051 DOI: 10.1016/j.dib.2017.09.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 08/09/2017] [Accepted: 09/18/2017] [Indexed: 11/08/2022] Open
Abstract
The data presented here had been originally collected for a research project entitled ‘Sleep EEG spectral analysis in psychophysiological insomnia and normal sleep subjects’. This article describes the data of 11 subjects, referred to Sleep Disorders Research Center (SDRC) in Kermanshah, Iran. The data includes 14 EEG, 6 EOG, and 3 EMG channels, with a sampling ratio of 256 Hz. It includes power spectral features in segments of 30 s for each channel, and nonlinear analysis parameter. Also, the complete demographic and polysomnography specifications are attached.
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Affiliation(s)
- Mohammad Rezaei
- Sleep Disorders Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Hiwa Mohammadi
- Sleep Disorders Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Habibolah Khazaie
- Sleep Disorders Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
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81
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Abstract
BACKGROUND Heart rate fluctuates beat-by-beat asymmetrically which is known as heart rate asymmetry (HRA). It is challenging to assess HRA robustly based on short-term heartbeat interval series. METHOD An area index (AI) was developed that combines the distance and phase angle information of points in the Poincaré plot. To test its performance, the AI was used to classify subjects with: (i) arrhythmia, and (ii) congestive heart failure, from the corresponding healthy controls. For comparison, the existing Porta's index (PI), Guzik's index (GI), and slope index (SI) were calculated. To test the effect of data length, we performed the analyses separately using long-term heartbeat interval series (derived from >3.6-h ECG) and short-term segments (with length of 500 intervals). A second short-term analysis was further carried out on series extracted from 5-min ECG. RESULTS For long-term data, SI showed acceptable performance for both tasks, i.e., for task i p < 0.001, Cohen's d = 0.93, AUC (area under the receiver-operating characteristic curve) = 0.86; for task ii p < 0.001, d = 0.88, AUC = 0.75. AI performed well for task ii (p < 0.001, d = 1.0, AUC = 0.78); for task i, though the difference was statistically significant (p < 0.001, AUC = 0.76), the effect size was small (d = 0.11). PI and GI failed in both tasks (p > 0.05, d < 0.4, AUC < 0.7 for all). However, for short-term segments, AI indicated better distinguishability for both tasks, i.e., for task i, p < 0.001, d = 0.71, AUC = 0.71; for task ii, p < 0.001, d = 0.93, AUC = 0.74. The rest three measures all failed with small effect sizes and AUC values (d < 0.5, AUC < 0.7 for all) although the difference in SI for task i was statistically significant (p < 0.001). Besides, AI displayed smaller variations across different short-term segments, indicating more robust performance. Results from the second short-term analysis were in keeping with those findings. CONCLUSION The proposed AI indicated better performance especially for short-term heartbeat interval data, suggesting potential in the ambulatory application of cardiovascular monitoring.
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82
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Mezentseva LV, Pertsov SS, Kopilov FY, Lastovetsky AG. Mathematical analysis of the stability of heart-rate dynamics in postinfarction patients. Biophysics (Nagoya-shi) 2017. [DOI: 10.1134/s0006350917030113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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83
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Ciccone AB, Siedlik JA, Wecht JM, Deckert JA, Nguyen ND, Weir JP. Reminder: RMSSD and SD1 are identical heart rate variability metrics. Muscle Nerve 2017; 56:674-678. [PMID: 28073153 DOI: 10.1002/mus.25573] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/08/2017] [Indexed: 11/10/2022]
Abstract
Assessment of heart rate variability (HRV) is a common approach to examine cardiac autonomic nervous system modulation that has been employed in a variety of settings. Frequently, both the root mean square of successive differences (RMSSD) and SD1, which is a Poincaré plot component, have been used to quantify short-term heart rate variability. It is not typically appreciated, however, that RMSSD and SD1 are identical metrics of HRV. As a reminder to clinicians and researchers who use and study HRV, we show both empirically and mathematically that RMSSD and SD1 are identical metrics. Because the homology between RMSSD and SD1 is not commonly known, the inclusion of both measures has been reported in many recent publications. The inappropriate use of such redundant data may affect the interpretation of HRV studies. Muscle Nerve 56: 674-678, 2017.
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Affiliation(s)
- Anthony B Ciccone
- Osness Human Performance Laboratories, Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, Kansas, 66045, USA
| | - Jacob A Siedlik
- Department of Exercise Science and Pre-Health Professions, Creighton University, Omaha Nebraska, USA
| | - Jill M Wecht
- Center for the Medical Consequences of Spinal Cord Injury, James J. Peters Veterans Affairs Medical Center, Bronx, New York, USA.,Department of Medicine and Rehabilitation Medicine, the Icahn School of Medicine, Mount Sinai, New York, New York, USA
| | - Jake A Deckert
- Osness Human Performance Laboratories, Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, Kansas, 66045, USA
| | - Nhuquynh D Nguyen
- Center for the Medical Consequences of Spinal Cord Injury, James J. Peters Veterans Affairs Medical Center, Bronx, New York, USA
| | - Joseph P Weir
- Osness Human Performance Laboratories, Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, Kansas, 66045, USA
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84
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García Bermejo P, de la Cruz Torres B, Naranjo Orellana J, Albornoz Cabello M. Autonomic activity in women during percutaneous needle electrolysis. Eur J Integr Med 2017. [DOI: 10.1016/j.eujim.2017.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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85
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García Bermejo P, De La Cruz Torres B, Naranjo Orellana J, Albornoz Cabello M. Autonomic Responses to Ultrasound-Guided Percutaneous Needle Electrolysis: Effect of Needle Puncture or Electrical Current? J Altern Complement Med 2017; 24:69-75. [PMID: 28135129 DOI: 10.1089/acm.2016.0339] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVE The aim of this study was to establish if the changes in sympathetic and parasympathetic activity (analyzed through heart-rate variability [HRV]) during ultrasound (US)-guided percutaneous needle electrolysis (PNE) is due to the effect of needle puncture only or of the PNE technique per se where the puncture and galvanic current are combined. METHODS This was an experimental, case-control study that took place at the University of Seville. Subjects were 36 male footballers who were randomly allocated to three groups: a control group (CG; 12 players), for whom HRV was recorded for 10 min, both at rest and during an exhaustive US examination of the patellar tendon and adjacent structures; a first experimental group (PNE group; 12 players), for whom HRV was recorded for 10 min, both at rest and during application of US-guided PNE in the patellar tendon; and a second experimental group (needle group; 12 players), for whom HRV was recorded for 10 min, both at rest and during application of US-guided PNE without electrical current in the patellar tendon. The outcome measures were the diameters of the Poincaré plot (SD1, SD2), stress score, and sympathetic/parasympathetic ratio. RESULTS There were no differences between groups in any baseline measurements, nor were there any significant differences between CG measurements (baseline vs. intervention). The PNE group exhibited statistically significant increases in SD1 (p = 0.01) and SD2 (p = 0.004) and statistically significant decreases in SS and S/PS ratio (p = 0.03), indicating increased parasympathetic and decreased sympathetic activity, respectively. The needle group exhibited statistically significant increases in SD2 (p = 0.02) and statistically significant decreases in SS (p = 0.02), indicating decreased sympathetic activity. CONCLUSIONS The application of the US-guided PNE technique caused a measurable increase in parasympathetic activity (detected by HRV), which was due to the combination of needle puncture and electric current.
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Alvarez MPB, da Silva TD, Favero FM, Valenti VE, Raimundo RD, Vanderlei LCM, Garner DM, Monteiro CBDM. Autonomic Modulation in Duchenne Muscular Dystrophy during a Computer Task: A Prospective Control Trial. PLoS One 2017; 12:e0169633. [PMID: 28118369 PMCID: PMC5261738 DOI: 10.1371/journal.pone.0169633] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 12/20/2016] [Indexed: 01/16/2023] Open
Abstract
INTRODUCTION Duchenne Muscular Dystrophy (DMD) is characterized by progressive muscle weakness that can lead to disability. Owing to functional difficulties faced by individuals with DMD, the use of assistive technology is essential to provide or facilitate functional abilities. In DMD, cardiac autonomic dysfunction has been reported in addition to musculoskeletal impairment. Consequently, the objective was to investigate acute cardiac autonomic responses, by Heart Rate Variability (HRV), during computer tasks in subjects with DMD. METHOD HRV was assessed by linear and nonlinear methods, using the heart rate monitor Polar RS800CX chest strap Electrocardiographic measuring device. Then, 45 subjects were included in the group with DMD and 45 in the healthy Typical Development (TD) control group. They were assessed for twenty minutes at rest sitting, and five minutes after undergoing a task on the computer. RESULTS Individuals with DMD had a statistically significant lower parasympathetic cardiac modulation at rest when compared to the control group, which further declined when undergoing the tasks on the computer. CONCLUSION DMD patients presented decreased HRV and exhibited greater intensity of cardiac autonomic responses during computer tasks characterized by vagal withdrawal when compared to the healthy TD control subjects.
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Affiliation(s)
- Mayra Priscila Boscolo Alvarez
- Physical Therapy, Speech and Occupational Therapy Department, School of Medicine, University of São Paulo, São Paulo, SP, Brazil
| | - Talita Dias da Silva
- Federal University of São Paulo, Paulista School of Medicine, São Paulo, SP, Brazil
| | - Francis Meire Favero
- Federal University of São Paulo, Department of Neurology/Neurosurgery, Paulista School of Medicine, São Paulo, SP, Brazil
- * E-mail:
| | - Vitor Engrácia Valenti
- Autonomic Nervous System Center Study, Speech Therapy Department Faculty of Sciences, Paulista State University (UNESP), Marília, SP, Brazil
| | - Rodrigo Daminello Raimundo
- Laboratory Design and Scientific Writing, Department of Community Health, ABC Medical School, Santo André, SP, Brazil
| | | | - David M. Garner
- Cardiorespiratory Research Group, Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Gipsy Lane, Oxford OX3 0BP, United Kingdom
| | - Carlos Bandeira de Mello Monteiro
- Physical Therapy, Speech and Occupational Therapy Department, School of Medicine, University of São Paulo, São Paulo, SP, Brazil
- School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, SP, Brazil
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87
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Ghaderyan P, Abbasi A. Dynamic Hilbert warping, a new measure of RR-interval signals evaluated in the cognitive load estimation. Med Eng Phys 2017; 40:103-109. [PMID: 28100405 DOI: 10.1016/j.medengphy.2016.12.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 12/02/2016] [Accepted: 12/21/2016] [Indexed: 11/20/2022]
Abstract
RR interval (RRI) signals represent the time intervals between successive heart R-waves. These signals are influenced by many cognitive and psychological processes. In this study, a new technique based on the combination of empirical mode decomposition and dynamic Hilbert warping (DHW) was proposed to inference cognitive states from measured RRI signals. Moreover, a set of entropic and statistical measures was extracted to characterize the regularity and temporal distribution in the phase spectra and amplitude envelope of the analytic signals. The discriminating capability of the proposed method was studied in 45 healthy subjects. They performed an arithmetic task with five levels of difficulty. The study indicated the importance of phase information in cognitive load estimation (CLE). The new phase characteristics were able to extract hidden information from the RRI signals. The results revealed a striking decrease in DHW value with increasing load level. The entropic measures of analytic signal also showed an increasing trend as the mental load increased. Although, phase information had an ability to discriminate between more distinct levels as well as between more similar ones, amplitude information was effective only in discriminating between more distinct levels.
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Affiliation(s)
- Peyvand Ghaderyan
- Department of Biomedical Engineering, Computational Neuroscience Laboratory, Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran.
| | - Ataollah Abbasi
- Department of Biomedical Engineering, Computational Neuroscience Laboratory, Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran.
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88
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Yaghoobi Karimui R, Azadi S. Cardiac arrhythmia classification using the phase space sorted by Poincare sections. Biocybern Biomed Eng 2017. [DOI: 10.1016/j.bbe.2017.08.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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89
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Visual Analysis of Nonlinear Dynamical Systems: Chaos, Fractals, Self-Similarity and the Limits of Prediction. SYSTEMS 2016. [DOI: 10.3390/systems4040037] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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90
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Garde A, Zhou G, Raihana S, Dunsmuir D, Karlen W, Dekhordi P, Huda T, Arifeen SE, Larson C, Kissoon N, Dumont GA, Ansermino JM. Respiratory rate and pulse oximetry derived information as predictors of hospital admission in young children in Bangladesh: a prospective observational study. BMJ Open 2016; 6:e011094. [PMID: 27534987 PMCID: PMC5013424 DOI: 10.1136/bmjopen-2016-011094] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
OBJECTIVE Hypoxaemia is a strong predictor of mortality in children. Early detection of deteriorating condition is vital to timely intervention. We hypothesise that measures of pulse oximetry dynamics may identify children requiring hospitalisation. Our aim was to develop a predictive tool using only objective data derived from pulse oximetry and observed respiratory rate to identify children at increased risk of hospital admission. SETTING Tertiary-level hospital emergency department in Bangladesh. PARTICIPANTS Children under 5 years (n=3374) presenting at the facility (October 2012-April 2013) without documented chronic diseases were recruited. 1-minute segments of pulse oximetry (photoplethysmogram (PPG), blood oxygen saturation (SpO2) and heart rate (HR)) and respiratory rate were collected with a mobile app. PRIMARY OUTCOME The need for hospitalisation based on expert physician review and follow-up. METHODS Pulse rate variability (PRV) using pulse peak intervals of the PPG signal and features extracted from the SpO2 signal, all derived from pulse oximetry recordings, were studied. A univariate age-adjusted logistic regression was applied to evaluate differences between admitted and non-admitted children. A multivariate logistic regression model was developed using a stepwise selection of predictors and was internally validated using bootstrapping. RESULTS Children admitted to hospital showed significantly (p<0.01) decreased PRV and higher SpO2 variability compared to non-admitted children. The strongest predictors of hospitalisation were reduced PRV-power in the low frequency band (OR associated with a 0.01 unit increase, 0.93; 95% CI 0.89 to 0.98), greater time spent below an SpO2 of 98% and 94% (OR associated with 10 s increase, 1.4; 95% CI 1.3 to 1.4 and 1.5; 95% CI 1.4 to 1.6, respectively), high respiratory rate, high HR, low SpO2, young age and male sex. These variables provided a bootstrap-corrected AUC of the receiver operating characteristic of 0.76. CONCLUSIONS Objective measurements, easily obtained using a mobile device in low-resource settings, can predict the need for hospitalisation. External validation will be required before clinical adoption.
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Affiliation(s)
- Ainara Garde
- Department of Electrical & Computer Engineering, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Guohai Zhou
- Department of Statistics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Shahreen Raihana
- Centre for Child and Adolescent Health, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Dustin Dunsmuir
- Department of Anesthesiology, Pharmacology & Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Walter Karlen
- Department of Health Sciences and Technology, ETH Zurich, Zürich, Switzerland
| | - Parastoo Dekhordi
- Department of Electrical & Computer Engineering, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Tanvir Huda
- Centre for Child and Adolescent Health, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
- School of Public Health, Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - Shams El Arifeen
- Centre for Child and Adolescent Health, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Charles Larson
- Department of Pediatrics, British Columbia Children's Hospital and The University of British Columbia, Vancouver, British Columbia, Canada
| | - Niranjan Kissoon
- Department of Pediatrics, British Columbia Children's Hospital and The University of British Columbia, Vancouver, British Columbia, Canada
| | - Guy A Dumont
- Department of Electrical & Computer Engineering, The University of British Columbia, Vancouver, British Columbia, Canada
| | - J Mark Ansermino
- Department of Anesthesiology, Pharmacology & Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada
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Bassett D, Bear N, Nutt D, Hood S, Bassett S, Hans D. Reduced heart rate variability in remitted bipolar disorder and recurrent depression. Aust N Z J Psychiatry 2016; 50:793-804. [PMID: 27307288 DOI: 10.1177/0004867416652734] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVE There is evidence that mood disorders are associated with impaired parasympathetic nervous system function and consequently increased morbidity and mortality. Our study addresses whether this impairment persists into remission in unipolar and bipolar disorders. METHODS Heart Rate Variability was measured in groups of subjects during remission, with Bipolar Affective Disorder I (n = 29), recurrent Major Depressive Disorder (n = 41) and a healthy control group (n = 38), during the bedtime period. RESULTS Heart Rate Variability was found to be lower in the bipolar and depression groups, compared with control subjects, using the Root Mean Square of Successive Distances variable, and lower in the depression group using the Standard Deviation of Normal to Normal variable and the Standard Deviation, Poincare Plot variable. CONCLUSION Autonomic function during bedtime was impaired in subjects with Bipolar I and recurrent Major Depressive Disorder, despite clinical remission. This has significant implications for the morbidity and mortality of patients with major mood disorders.
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Affiliation(s)
- Darryl Bassett
- University of Notre Dame, Fremantle, WA, Australia The University of Western Australia, Nedlands, WA, Australia Hollywood Specialist Centre, Nedlands, WA, Australia
| | | | | | - Sean Hood
- School of Psychiatry and Clinical Neurosciences, The University of Western Australia, Nedlands, WA, Australia
| | | | - Davinder Hans
- Sir Charles Gairdner Hospital, Nedlands, WA, Australia
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Is there a differential impact of parity on factors regulating maternal peripheral resistance? Hypertens Res 2016; 39:737-743. [DOI: 10.1038/hr.2016.60] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 03/26/2016] [Accepted: 04/14/2016] [Indexed: 11/09/2022]
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93
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de Rezende Barbosa MP, Júnior JN, Cassemiro BM, Bernardo AFB, França da Silva AK, Vanderlei FM, Pastre CM, Vanderlei LCM. Effects of functional training on geometric indices of heart rate variability. JOURNAL OF SPORT AND HEALTH SCIENCE 2016; 5:183-189. [PMID: 30356501 PMCID: PMC6188576 DOI: 10.1016/j.jshs.2014.12.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 11/20/2014] [Accepted: 12/03/2014] [Indexed: 05/12/2023]
Abstract
BACKGROUND Geometric methods provide an analysis of autonomic modulation using the geometric properties of the resulting pattern, and represent an interesting tool in the analysis of heart rate variability (HRV). The aim of this study was to evaluate the impact of functional training on cardiac autonomic modulation in healthy young women using the geometric indices of HRV. METHODS Data were analyzed from 29 women, and were stratified into a functional training group (FTG, n = 13; 23.00 ± 2.51 years; 21.90 ± 2.82 kg/m2) and a control group (CG, n = 16; 20.56 ± 1.03 years; 22.12 ± 3.86 kg/m2). The FTG received periodized functional training for 12 weeks. The cardiac autonomic modulation of both groups was evaluated before and after this training, and a qualitative analysis was performed using the Poincaré plot. RESULTS There was a significant increase in the difference of the triangular index (RRTri), SD1, SD2, and RR intervals in the FTG as compared to the CG, and the qualitative analysis from the Poincaré plot showed an increase in the dispersion of beat-to-beat and long-term RR intervals in the functional group after training. No changes were observed in the triangular interpolation of RR interval histogram (TINN) or SD1/SD2. CONCLUSION Functional training had a beneficial impact on autonomic modulation, as characterized by increased parasympathetic activity and overall variability, thus highlighting the clinical usefulness of this type of training.
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Affiliation(s)
- Marianne P.C. de Rezende Barbosa
- Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
- Laboratory of Stress Physiology, Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
- Corresponding author. Laboratory of Stress Physiology, Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil.
| | - Jayme Netto Júnior
- Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
| | - Bruna M. Cassemiro
- Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
| | - Aline Fernanda B. Bernardo
- Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
- Laboratory of Stress Physiology, Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
| | - Anne K. França da Silva
- Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
- Laboratory of Stress Physiology, Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
| | - Franciele M. Vanderlei
- Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
- Laboratory of Stress Physiology, Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
| | - Carlos Marcelo Pastre
- Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
| | - Luiz Carlos M. Vanderlei
- Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
- Laboratory of Stress Physiology, Physiotherapy Department, University of Estadual Paulista, Presidente Prudente, SP 19060–900, Brazil
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de la Cruz Torres B, Albornoz Cabello M, García Bermejo P, Naranjo Orellana J. Autonomic responses to ultrasound-guided percutaneous needle electrolysis of the patellar tendon in healthy male footballers. Acupunct Med 2016; 34:275-9. [PMID: 26792776 DOI: 10.1136/acupmed-2015-010993] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/29/2015] [Indexed: 12/13/2022]
Abstract
BACKGROUND Ultrasound (US)-guided percutaneous needle electrolysis (PNE) is a novel minimally invasive approach, which involves the application of a galvanic current via an acupuncture needle. As in any procedure involving needling, vagal reactions have been reported during PNE. OBJECTIVE To examine for changes in autonomic activity during the US-guided PNE technique on healthy patellar tendons by measurement and analysis of heart rate variability (HRV). METHODS Twenty-two male footballers were randomly allocated to: a control group (11 players), for whom HRV was recorded for 10 min, both at rest and during an exhaustive US examination of the patellar tendon and adjacent structures; and an experimental group (11 players), for whom HRV was recorded for 10 min, both at rest and during application of US-guided PNE on the patellar tendon. The following HRV parameters were assessed: mean NN interval, mean heart rate, time domain parameters (SDNN, rMSSD, pNN50), diameters of the Poincaré plot (SD1, SD2), stress score, and sympathetic/parasympathetic ratio. RESULTS There were no differences between groups in any baseline measurements, nor were there any significant differences between control group measurements (baseline vs intervention). The experimental group exhibited statistically significant increases in SDNN/SD1 (p=0.02/p=0.03) and SD2 (p=0.03), indicating increased parasympathetic and decreased sympathetic activity, respectively. CONCLUSIONS US-guided PNE was associated with an autonomic imbalance characterised by greater parasympathetic activity, which could potentially result in a vasovagal reaction. Care should be taken to monitor for adverse reactions during US-guided PNE and simple HRV indicators may have a role in early detection.
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Affiliation(s)
| | | | - Paula García Bermejo
- Department of Physiotherapy, University of Seville. Avicena Street, Seville, Spain
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95
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Hoshi RA, Vanderlei LCM, de Godoy MF, Bastos FDN, Netto J, Pastre CM. Temporal sequence of recovery-related events following maximal exercise assessed by heart rate variability and blood lactate concentration. Clin Physiol Funct Imaging 2016; 37:536-543. [DOI: 10.1111/cpf.12339] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 11/19/2015] [Indexed: 11/30/2022]
Affiliation(s)
- Rosangela Akemi Hoshi
- FAMERP - Faculdade de Medicina de São José do Rio Preto; Cardiology and Cardiovascular Surgery Departament; Transdisciplinary Nucleus of Studies on Complexity and Chaos (NUTECC); São José do Rio Preto São Paulo Brazil
| | - Luiz Carlos Marques Vanderlei
- UNESP - Universidade Estadual Paulista; campus of Presidente Prudente; Physical Therapy Departament; Presidente Pudente; São Paulo Brazil
| | - Moacir Fernandes de Godoy
- FAMERP - Faculdade de Medicina de São José do Rio Preto; Cardiology and Cardiovascular Surgery Departament; Transdisciplinary Nucleus of Studies on Complexity and Chaos (NUTECC); São José do Rio Preto São Paulo Brazil
| | - Fábio do Nascimento Bastos
- UENP - Universidade Estadual do Norte do Paraná, Physical Therapy Department, Jacarezinho; Paraná Brazil
| | - Jayme Netto
- UNESP - Universidade Estadual Paulista; campus of Presidente Prudente; Physical Therapy Departament; Presidente Pudente; São Paulo Brazil
| | - Carlos Marcelo Pastre
- UNESP - Universidade Estadual Paulista; campus of Presidente Prudente; Physical Therapy Departament; Presidente Pudente; São Paulo Brazil
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96
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Nardelli M, Valenza G, Greco A, Lanata A, Scilingo EP. Arousal recognition system based on heartbeat dynamics during auditory elicitation. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2015:6110-3. [PMID: 26737686 DOI: 10.1109/embc.2015.7319786] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This study reports on the recognition of different arousal levels, elicited by affective sounds, performed using estimates of autonomic nervous system dynamics. Specifically, as a part of the circumplex model of affect, arousal levels were recognized by properly combining information gathered from standard and nonlinear analysis of heartbeat dynamics, which was derived from the electrocardiogram (ECG). Affective sounds were gathered from the International Affective Digitized Sound System and grouped into four different levels of arousal. A group of 27 healthy volunteers underwent such elicitation while ECG signals were continuously recorded. Results showed that a quadratic discriminant classifier, as applied implementing a leave-one-subject-out procedure, achieved a recognition accuracy of 84.26%. Moreover, this study confirms the crucial role of heartbeat nonlinear dynamics for emotion recognition, hereby estimated through lagged Poincare plots.
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97
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Pilot Randomized Study of a Gratitude Journaling Intervention on Heart Rate Variability and Inflammatory Biomarkers in Patients With Stage B Heart Failure. Psychosom Med 2016; 78:667-76. [PMID: 27187845 PMCID: PMC4927423 DOI: 10.1097/psy.0000000000000316] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Stage B, asymptomatic heart failure (HF) presents a therapeutic window for attenuating disease progression and development of HF symptoms, and improving quality of life. Gratitude, the practice of appreciating positive life features, is highly related to quality of life, leading to development of promising clinical interventions. However, few gratitude studies have investigated objective measures of physical health; most relied on self-report measures. We conducted a pilot study in Stage B HF patients to examine whether gratitude journaling improved biomarkers related to HF prognosis. METHODS Patients (n = 70; mean [standard deviation] age = 66.2 [7.6] years) were randomized to an 8-week gratitude journaling intervention or treatment as usual. Baseline (T1) assessments included the six-item Gratitude Questionnaire, resting heart rate variability (HRV), and an inflammatory biomarker index. At T2 (midintervention), the six-item Gratitude Questionnaire was measured. At T3 (postintervention), T1 measures were repeated but also included a gratitude journaling task. RESULTS The gratitude intervention was associated with improved trait gratitude scores (F = 6.0, p = .017, η = 0.10), reduced inflammatory biomarker index score over time (F = 9.7, p = .004, η = 0.21), and increased parasympathetic HRV responses during the gratitude journaling task (F = 4.2, p = .036, η = 0.15), compared with treatment as usual. However, there were no resting preintervention to postintervention group differences in HRV (p values > .10). CONCLUSIONS Gratitude journaling may improve biomarkers related to HF morbidity, such as reduced inflammation; large-scale studies with active control conditions are needed to confirm these findings. TRIAL REGISTRATION Clinicaltrials.govidentifier:NCT01615094.
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The effects of cold water immersion with different dosages (duration and temperature variations) on heart rate variability post-exercise recovery: A randomized controlled trial. J Sci Med Sport 2015; 19:676-81. [PMID: 26614422 DOI: 10.1016/j.jsams.2015.10.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 09/21/2015] [Accepted: 10/07/2015] [Indexed: 11/22/2022]
Abstract
OBJECTIVES The aim of the present study was to investigate the effects of cold water immersion during post-exercise recovery, with different durations and temperatures, on heart rate variability indices. DESIGN Hundred participants performed a protocol of jumps and a Wingate test, and immediately afterwards were immersed in cold water, according to the characteristics of each group (CG: control; G1: 5' at 9±1°C; G2: 5' at 14±1°C; G3: 15' at 9±1°C; G4: 15' at 14±1°C). METHODS Analyses were performed at baseline, during the CWI recuperative technique (TRec) and 20, 30, 40, 50 and 60min post-exercise. The average HRV indices of all RR-intervals in each analysis period (MeanRR), standard deviation of normal RR-intervals (SDNN), square root of the mean of the sum of the squares of differences between adjacent RR-intervals (RMSSD), spectral components of very low frequency (VLF), low frequency (LF) and high frequency (HF), scatter of points perpendicular to the line of identity of the Poincaré Plot (SD1) and scatter points along the line of identity (SD2) were assessed. RESULTS Mean RR, VLF and LF presented an anticipated return to baseline values at all the intervention groups, but the same was observed for SDNN and SD2 only in the immersion for 15min at 14°C group (G4). In addition, G4 presented higher values when compared to CG. CONCLUSIONS These findings demonstrate that if the purpose of the recovery process is restoration of cardiac autonomic modulation, the technique is recommended, specifically for 15min at 14°C.
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Mezentseva LV, Pertsov SS, Hugaeva VK. The persistence of blood-flow oscillations in the rat kidney. Biophysics (Nagoya-shi) 2015. [DOI: 10.1134/s0006350915060196] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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100
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Mezentseva LV, Pertsov SS. Computer modeling-based analysis of the persistence of different modes of heart-rate dynamics. Biophysics (Nagoya-shi) 2015. [DOI: 10.1134/s0006350915050127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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