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Heart rate variability

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https://www.readbyqxmd.com/read/29166320/exercise-alters-gut-microbiota-composition-and-function-in-lean-and-obese-humans
#1
Jacob M Allen, Lucy J Mailing, Grace M Niemiro, Rachel Moore, Mark D Cook, Bryan A White, Hannah D Holscher, Jeffrey A Woods
PURPOSE: Exercise is associated with altered gut microbial composition, but studies have not investigated whether the gut microbiota and associated metabolites are modulated by exercise training in humans. We explored the impact of six weeks of endurance exercise on the composition, functional capacity, and metabolic output of the gut microbiota in lean and obese adults with multiple-day dietary controls prior to outcome variable collection. METHODS: Thirty-two lean (n=18 [9 female]) and obese (n=14 [11 female]), previously sedentary subjects participated in six weeks of supervised, endurance-based exercise training (3 days/wk) that progressed from 30 to 60 minutes/day and from moderate (60% of heart rate reserve [HRR]) to vigorous intensity (75% HRR)...
November 20, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29164443/child-autism-spectrum-disorder-traits-and-parenting-stress-the-utility-of-using-a-physiological-measure-of-parental-stress
#2
Reina S Factor, Deanna M Swain, Angela Scarpa
Caregivers of children with autism spectrum disorder (ASD) report greater stress due to unique parenting demands (e.g.; Estes et al. in Brain Dev 35(2):133-138, 2013). Stress is often studied through self-report and has not been extensively studied using physiological measures. This study compared parenting stress in mothers of children with and without ASD traits. Twenty-seven mother-child dyads participated in an interaction task while measuring mother's heart rate variability (HRV) and mothers self-reported stress levels...
November 21, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/29164276/physical-activity-and-heart-rate-variability-in-adolescents-with-abdominal-obesity
#3
Breno Quintella Farah, Aluísio Andrade-Lima, Antônio Henrique Germano-Soares, Diego Giulliano Destro Christofaro, Mauro Virgílio Gomes de Barros, Wagner Luiz do Prado, Raphael M Ritti-Dias
Physical activity is a protective factor for autonomic dysfunction. However, whether this occurs in adolescents with abdominal obesity is still unclear. Thus, the aim of this study was to analyze the association between physical activity and heart rate variability (HRV) in adolescents with and without abdominal obesity. This cross-sectional study included 1152 boys (age: 17 ± 1 years). HRV measures of time (root mean square of the squared differences between adjacent normal RR intervals-RMSSD and the percentage of adjacent intervals over 50 ms-PNN50) and frequency domains (balance sympathetic-vagal-LF/HF) were evaluated, as well as total physical activity, commuting physical activity, leisure-time physical activity, and abdominal obesity...
November 21, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/29163251/consumer-neuroscience-based-metrics-predict-recall-liking-and-viewing-rates-in-online-advertising
#4
Jaime Guixeres, Enrique Bigné, Jose M Ausín Azofra, Mariano Alcañiz Raya, Adrián Colomer Granero, Félix Fuentes Hurtado, Valery Naranjo Ornedo
The purpose of the present study is to investigate whether the effectiveness of a new ad on digital channels (YouTube) can be predicted by using neural networks and neuroscience-based metrics (brain response, heart rate variability and eye tracking). Neurophysiological records from 35 participants were exposed to 8 relevant TV Super Bowl commercials. Correlations between neurophysiological-based metrics, ad recall, ad liking, the ACE metrix score and the number of views on YouTube during a year were investigated...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29163210/a-wearable-test-for-maximum-aerobic-power-real-time-analysis-of-a-60-m-sprint-performance-and-heart-rate-off-kinetics
#5
Jorge L Storniolo, Gaspare Pavei, Alberto E Minetti
Maximum aerobic power ([Formula: see text]) as an indicator of body fitness is today a very well-known concept not just for athletes but also for the layman. Unfortunately, the accurate measurement of that variable has remained a complex and exhaustive laboratory procedure, which makes it inaccessible to many active people. In this paper we propose a quick estimate of it, mainly based on the heart rate off-kinetics immediately after an all-out 60-m sprint run. The design of this test took into account the recent availability of wrist wearable, heart band free, multi-sensor smart devices, which could also inertially detect the different phases of the sprint and check the distance run...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29163192/cycling-before-and-after-exhaustion-differently-affects-cardiac-autonomic-control-during-heart-rate-matched-exercise
#6
Matthias Weippert, Martin Behrens, Anett Mau-Moeller, Sven Bruhn, Kristin Behrens
During cycling before (PRE) and after exhaustion (POST) different modes of autonomic cardiac control might occur due to different interoceptive input and altered influences from higher brain centers. We hypothesized that heart rate variability (HRV) is significantly affected by an interaction of the experimental period (PRE vs. POST) and exercise intensity (HIGH vs. LOW; HIGH = HR > HR at the lactate threshold (HRLT), LOW = HR ≤ HRLT) despite identical average HR. Methods: Fifty healthy volunteers completed an incremental cycling test until exhaustion...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29163100/resting-heart-rate-variability-facets-of-rumination-and-trait-anxiety-implications-for-the-perseverative-cognition-hypothesis
#7
DeWayne P Williams, Nicole R Feeling, LaBarron K Hill, Derek P Spangler, Julian Koenig, Julian F Thayer
The perseverative cognition hypothesis (PCH) posits that perseveration, defined as the repetitive or sustained activation of cognitive representations of a real or imagined stressor, is a primary mechanism linking psychological (or stress) vulnerability with poor health and disease. Resting vagally mediated heart rate variability (vmHRV) is an important indicator of self-regulatory abilities, stress vulnerability and overall health. Those with lower resting vmHRV are more vulnerable to stress, and thus more likely to engage in perseverative cognition and experience subsequent negative mental health outcomes such as anxiety...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29161745/resting-autonomic-function-in-active-and-insufficiently-active-people-living-with-hiv
#8
Norberto Quiles, Carol Garber, Joseph Ciccolo
Autonomic dysfunction appears to be prevalent in people living with HIV/AIDS (PLWHA). However, there are limited data on the resting autonomic responses to exercise in active and insufficiently active PLWHA. We aimed to determine whether active PLWHA have better autonomic responses compared with insufficiently active PLWHA. Active PLWHA receiving anti-retroviral therapy (n=13) and insufficiently active PLWHA (n=10) were recruited. A 10-min recording of the supine electrocardiogram was taken. Resting heart rate variability was analyzed from this electrocardiogram...
November 21, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29161351/echoes-of-affective-stimulation-in-brain-connectivity-networks
#9
Viola Borchardt, Yan Fan, Marie Dietz, Ana Lucia Herrera Melendez, Malek Bajbouj, Matti Gärtner, Meng Li, Martin Walter, Simone Grimm
Affective experience has effects on subjective feelings, physiological indices, entails immediate activity changes in the brain, and even influences brain networks in a protracted manner. However, it is still unclear, how the functional connectivity (FC) interplay between major intrinsic connectivity networks upon affective stimulation depends on affective valence, and whether this is specific for affective experience, i.e., can be distinguished from cognitive task execution. Our study included fMRI scans during and after affective stimulation with sad and neutral movies and a working memory task complemented with measures of cardiovascular activity and mood...
November 17, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29160925/effects-of-swaddled-and-traditional-tub-bathing-methods-on-crying-and-physiological-responses-of-newborns
#10
Sinem Yalnızoğlu Çaka, Duygu Gözen
PURPOSE: The purpose of this study was to examine the effects of two bathing methods on crying duration and physiological measurements of newborns. DESIGN AND METHODS: A randomized trial design was used in this study. The sample consisted of newborns (n = 80) who were admitted to neonatal intensive care unit of a university hospital located in a large city. The groups were determined as swaddled bathing (SB) (n = 40) and traditional tub bathing (TTB) (n = 40) by using random number table...
November 21, 2017: Journal for Specialists in Pediatric Nursing: JSPN
https://www.readbyqxmd.com/read/29160828/parent-cardiac-response-in-the-context-of-their-child-s-completion-of-the-cold-pressor-task-a-pilot-study
#11
Kaytlin Constantin, Rachel L Moline, C Meghan McMurtry, Heidi N Bailey
Parents' ability to regulate their emotions is essential to providing supportive caregiving behaviours when their child is in pain. Extant research focuses on parent self-reported experience or observable behavioural responses. Physiological responding, such as heart rate (HR) and heart rate variability (HRV), is critical to the experience and regulation of emotions and provides a complementary perspective on parent experience; yet, it is scarcely assessed. This pilot study examined parent (n = 25) cardiac response (HR, HRV) at rest (neutral film clip), immediately before the cold pressor task (pre-CPT), and following the CPT (post-CPT)...
November 21, 2017: Children
https://www.readbyqxmd.com/read/29160157/social-support-self-rated-health-and-low-mood-in-people-on-sick-leave-due-to-heart-failure-a-cross-sectional-study
#12
Lena Nordgren, Anne Söderlund
AIMS: The aim of this study was to investigate social support in relation to self-rated health and the prevalence of low mood in people on sick leave due to heart failure. METHODS: A cross-sectional design was used, and 590 individuals on sick leave due to heart failure in Sweden responded to the postal questionnaire. The questions therein concerned received and needed functional and structural support from managers, work colleagues, families and friends. Multivariate analyses were conducted...
July 1, 2017: Scandinavian Journal of Public Health
https://www.readbyqxmd.com/read/29159698/analysis-of-biosignals-during-immersion-in-computer-games
#13
Mina Yeo, Seokbeen Lim, Gilwon Yoon
The number of computer game users is increasing as computers and various IT devices in connection with the Internet are commonplace in all ages. In this research, in order to find the relevance of behavioral activity and its associated biosignal, biosignal changes before and after as well as during computer games were measured and analyzed for 31 subjects. For this purpose, a device to measure electrocardiogram, photoplethysmogram and skin temperature was developed such that the effect of motion artifacts could be minimized...
November 17, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/29158992/hrv-derived-data-similarity-and-distribution-index-based-on-ensemble-neural-network-for-measuring-depth-of-anaesthesia
#14
Quan Liu, Li Ma, Ren-Chun Chiu, Shou-Zen Fan, Maysam F Abbod, Jiann-Shing Shieh
Evaluation of depth of anaesthesia (DoA) is critical in clinical surgery. Indices derived from electroencephalogram (EEG) are currently widely used to quantify DoA. However, there are known to be inaccurate under certain conditions; therefore, experienced anaesthesiologists rely on the monitoring of vital signs such as body temperature, pulse rate, respiration rate, and blood pressure to control the procedure. Because of the lack of an ideal approach for quantifying level of consciousness, studies have been conducted to develop improved methods of measuring DoA...
2017: PeerJ
https://www.readbyqxmd.com/read/29158116/is-intuitive-eating-related-to-resting-state-vagal-activity
#15
Stephanie K V Peschel, Tracy L Tylka, DeWayne P Williams, Michael Kaess, Julian F Thayer, Julian Koenig
Efferent and afferent fibers of the vagus nerve are involved in regulating hunger and satiety. Vagally-mediated heart rate variability (vmHRV) reflects vagal activity. Previously no study addressed a potential association between resting state vagal activity and intuitive eating. Self-reports on intuitive eating and measures of resting state vmHRV were obtained in 39 students (16 female, mean age: 19.64±1.44years). Hierarchical multiple regression models showed that, after controlling for gender, age, and body mass index, resting vagal activity was inversely related to the Unconditional Permission to Eat subscale of the Intuitive Eating scale...
November 15, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29158065/electrocardiographic-predictors-of-morbidity-and-mortality-in-patients-with-acute-myocarditis-the-importance-of-qrs-t-angle
#16
Shmuel Chen, Sarah Hoss, Vicki Zeniou, Ayelet Shauer, Dan Admon, Donna R Zwas, Chaim Lotan, Andre Keren, Israel Gotsman
BACKGROUND: Acute myocarditis carries a variable prognosis. We evaluated the morbidity and mortality rates in patients with acute myocarditis and admission electrocardiographic predictors of outcome. METHODS: Patients admitted to a tertiary hospital with a clinical diagnosis of acute myocarditis were evaluated. RESULTS: 193 patients were included. Median follow-up was 5.7 years; 82% were males, median age of 30 years (21-39). The most common clinical presentations were chest pain (77%) and fever (53%)...
November 17, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/29157585/cardiac-autonomic-control-during-sleep-in-patients-with-myotonic-dystrophy-type-1-the-effects-of-comorbid-obstructive-sleep-apnea
#17
Eleonora Tobaldini, Giorgio Colombo, Monica Solbiati, Chiara Cogliati, Lucia Morandi, Alessandro Pincherle, Nicola Montano
OBJECTIVE: Myotonic dystrophy type 1 (DM1) is a hereditary myopathy characterized by an autosomal dominant inheritance with important cardiovascular and autonomic deregulation. DM1 patients have a high prevalence of obstructive sleep apnea (OSA), but the effects of this comorbidity on cardiovascular autonomic control (CAC) are unknown. The present study aimed to investigate CAC during sleep-wake cycle in DM1 patients, taking into account the effects of OSA comorbidity. METHOD: Twenty-three patients with a diagnosis of DM1, and a control group, underwent a complete polysomnographic study (PSG)...
November 2017: Sleep Medicine
https://www.readbyqxmd.com/read/29157452/evolution-of-linear-and-nonlinear-fetal-heart-rate-indices-throughout-pregnancy-in-appropriate-small-for-gestational-age-and-preterm-fetuses-a-cohort-study
#18
Hernâni Gonçalves, Célia Amorim-Costa, Diogo Ayres-de-Campos, João Bernardes
BACKGROUND AND OBJECTIVES: To assess the evolution of linear and nonlinear fetal heart rate (FHR) analysis throughout pregnancy in appropriate (AGA), small for gestational age (SGA) and preterm (PTB) fetuses. METHODS: A prospective cohort study was carried out in 171 singleton pregnancies divided in three groups: AGA (n = 147), SGA (n = 13) fetuses and spontaneous PTB (n = 11). FHR was recorded with an external sensor from the 24th to the 40th week of gestation...
January 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29157449/paroxysmal-atrial-fibrillation-prediction-based-on-hrv-analysis-and-non-dominated-sorting-genetic-algorithm-iii
#19
K H Boon, M Khalil-Hani, M B Malarvili
This paper presents a method that able to predict the paroxysmal atrial fibrillation (PAF). The method uses shorter heart rate variability (HRV) signals when compared to existing methods, and achieves good prediction accuracy. PAF is a common cardiac arrhythmia that increases the health risk of a patient, and the development of an accurate predictor of the onset of PAF is clinical important because it increases the possibility to electrically stabilize and prevent the onset of atrial arrhythmias with different pacing techniques...
January 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29157250/ozone-exposure-is-associated-with-acute-changes-in-inflammation-fibrinolysis-and-endothelial-cell-function-in-coronary-artery-disease-patients
#20
Jaime E Mirowsky, Martha Sue Carraway, Radhika Dhingra, Haiyan Tong, Lucas Neas, David Diaz-Sanchez, Wayne Cascio, Martin Case, James Crooks, Elizabeth R Hauser, Z Elaine Dowdy, William E Kraus, Robert B Devlin
BACKGROUND: Air pollution is a major risk factor for cardiovascular disease, of which ozone is a major contributor. Several studies have found associations between ozone and cardiovascular morbidity, but the results have been inconclusive. We investigated associations between ozone and changes across biological pathways associated with cardiovascular disease. METHODS: Using a panel study design, 13 participants with coronary artery disease were assessed for markers of systemic inflammation, heart rate variability and repolarization, lipids, blood pressure, and endothelial function...
November 21, 2017: Environmental Health: a Global Access Science Source
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