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heart rate variability and well-being

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https://www.readbyqxmd.com/read/27933574/-long-term-hrv-analysis-shows-stress-reduction-by-magnesium-intake
#1
Elmar Wienecke, Claudia Nolden
BACKGROUND: Mental pressure and stress represent an ever-increasing socio-political challenge. The heart rate variability (HRV) measurement, which has its origin in the cardiac function diagnosis, gives information on the neurovegetative activity. A low HRV shows an imbalance of the sympathetic and parasympathetic efferents and thus is an indicator of stress. METHOD: A randomized, controlled, two-armed parallel study with 100 participants and a period of 90 days was performed...
December 2016: MMW Fortschritte der Medizin
https://www.readbyqxmd.com/read/27930706/do-reported-effects-of-acute-aerobic-exercise-on-subsequent-higher-cognitive-performances-remain-if-tested-against-an-instructed-self-myofascial-release-training-control-group-a-randomized-controlled-trial
#2
Max Oberste, Wilhelm Bloch, Sven T Hübner, Philipp Zimmer
A substantial body of evidence suggests positive effects of acute aerobic exercise (AAE) on subsequent higher cognitive functions in healthy young adults. These effects are widely understood as a result of the ongoing physiological adaptation processes induced by the preceding AAE. However, designs of published studies do not control for placebo, Hawthorne and subject expectancy effects. Therefore, these studies do not, at a high degree of validity, allow attributing effects of AEE on subsequent cognitive performance to exercise induced physical arousal...
2016: PloS One
https://www.readbyqxmd.com/read/27928212/relationship-between-autonomic-markers-of-heart-rate-and-subjective-indicators-of-recovery-status-in-male-elite-badminton-players
#3
Christo A Bisschoff, Ben Coetzee, Michael R Esco
The primary aim of the study was to determine if heart rate variability (HRV), and heart rate recovery (HRR) are related to several subjective indicators of recovery status (muscle soreness, hydration status, sleep quality and quantity as well as pre-competition mood states) for different match periods in male, elite, African, singles badminton players. HRV and HRR were measured in twenty-two badminton players before (pre-match), during (in-match), after (post-match) and during rest periods (in-match rest) of 46 national and international matches...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27924215/influence-diagram-of-physiological-and-environmental-factors-affecting-heart-rate-variability-an-extended-literature-overview
#4
REVIEW
Julien Fatisson, Victor Oswald, François Lalonde
Heart rate variability (HRV) corresponds to the adaptation of the heart to any stimulus. In fact, among the pathologies affecting HRV the most, there are the cardiovascular diseases and depressive disorders, which are associated with high medical cost in Western societies. Consequently, HRV is now widely used as an index of health. In order to better understand how this adaptation takes place, it is necessary to examine which factors directly influence HRV, whether they have a physiological or environmental origin...
January 2016: Heart International
https://www.readbyqxmd.com/read/27920726/hrvanalysis-a-free-software-for-analyzing-cardiac-autonomic-activity
#5
Vincent Pichot, Frédéric Roche, Sébastien Celle, Jean-Claude Barthélémy, Florian Chouchou
Since the pioneering studies of the 1960s, heart rate variability (HRV) has become an increasingly used non-invasive tool for examining cardiac autonomic functions and dysfunctions in various populations and conditions. Many calculation methods have been developed to address these issues, each with their strengths and weaknesses. Although, its interpretation may remain difficult, this technique provides, from a non-invasive approach, reliable physiological information that was previously inaccessible, in many fields including death and health prediction, training and overtraining, cardiac and respiratory rehabilitation, sleep-disordered breathing, large cohort follow-ups, children's autonomic status, anesthesia, or neurophysiological studies...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27919337/radiation-and-circulatory-disease
#6
Mark P Little
Exposure to therapeutic doses of ionizing radiation is associated with damage to the heart and coronary arteries. However, only recently have studies with high-quality individual dosimetry data allowed this risk to be quantified while also adjusting for concomitant chemotherapy, and medical and lifestyle risk factors. At lower levels of exposure the evidence is less clear. In this article I review radiation-associated risks of circulatory disease in groups treated with radiotherapy for malignant and non-malignant disease, and in occupationally- or environmentally-exposed groups receiving rather lower levels of radiation dose, also for medical diagnostic purposes...
October 2016: Mutation Research
https://www.readbyqxmd.com/read/27912162/serotonin-2a-receptor-5-ht2a-gene-promoter-variant-interacts-with-chronic-perceived-stress-to-modulate-resting-parasympathetic-activity-in-humans
#7
Chuan-Chia Chang, Wen-Hui Fang, Hsin-An Chang, Tieh-Ching Chang, Jia-Fwa Shyu, San-Yuan Huang
Decreased resting vagal (parasympathetic) tone is implicated in the development of stress-related disorders, including anxiety and depression. Chronic stress elevates the expression of serotonin 2A receptors (5-HT2A), while activation of 5-HT2A leads to inhibition of parasympathetic synaptic transmission. The T allele of the promoter variant, rs6311 (C>T), of the 5-HT2A gene has been shown to increase the 5-HT2A expression in vitro and to be associated with anxiety and depressive disorders. We thus hypothesized that the 5-HT2A functional polymorphism may influence resting vagal activity among persons with chronically high levels of perceived stress...
November 16, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27900417/definition-of-hemodynamic-stability-in-blunt-trauma-patients-a-systematic-review-and-assessment-amongst-dutch-trauma-team-members
#8
S A I Loggers, T W A Koedam, G F Giannakopoulos, E Vandewalle, M Erwteman, W P Zuidema
INTRODUCTION: Trauma is a great contributor to mortality worldwide. One of the challenges in trauma care is early identification and management of bleeding. The circulatory status of blunt trauma patients in the emergency room is evaluated using hemodynamic (HD) parameters. However, there is no consensus on which parameters to use. In this study, we evaluate the used terms and definitions in the literature for HD stability and compare those to the opinion of Dutch trauma team members...
November 30, 2016: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/27895588/influence-of-heart-rate-in-non-linear-hrv-indices-as-a-sampling-rate-effect-evaluated-on-supine-and-standing
#9
Juan Bolea, Esther Pueyo, Michele Orini, Raquel Bailón
The purpose of this study is to characterize and attenuate the influence of mean heart rate (HR) on nonlinear heart rate variability (HRV) indices (correlation dimension, sample, and approximate entropy) as a consequence of being the HR the intrinsic sampling rate of HRV signal. This influence can notably alter nonlinear HRV indices and lead to biased information regarding autonomic nervous system (ANS) modulation. First, a simulation study was carried out to characterize the dependence of nonlinear HRV indices on HR assuming similar ANS modulation...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27888320/cardiac-mechanics-and-heart-rate-variability-in-patients-with-systemic-sclerosis-the-association-that-we-should-not-miss
#10
Maja Zlatanovic, Marijana Tadic, Vera Celic, Branislava Ivanovic, Ana Stevanovic, Nemanja Damjanov
We aimed to determine left ventricular (LV) and right ventricular (RV) structure, function and mechanics, as well as heart rate variability (HRV), and their relationship, in patients with systemic sclerosis (SSc). The study included 41 SSc patients and 30 age-matched healthy volunteers. All the patients underwent clinical examination, serological tests, pulmonary function testing, 24-h Holter monitoring and complete two-dimensional echocardiography including strain analysis. The parameters of LV structure (interventricular septum thickness and LV mass index) and RV structure (RV wall thickness) were significantly higher in SSc patients...
November 25, 2016: Rheumatology International
https://www.readbyqxmd.com/read/27873227/the-relationship-between-aortic-root-size-and-hypertension-an-unsolved-conundrum
#11
Giuseppe Mulè, Emilio Nardi, Massimiliano Morreale, Antonella Castiglia, Giulio Geraci, Dario Altieri, Valentina Cacciatore, Margherita Schillaci, Francesco Vaccaro, Santina Cottone
Thoracic aortic aneurysms rupture and dissection are among the most devastating vascular diseases, being characterized by elevated mortality, despite improvements in diagnostic imaging and surgical techniques.An increased aortic root diameter (ARD) represents the main risk factor for thoracic aortic dissection and rupture and for aortic valve regurgitation.Even though arterial hypertension is commonly regarded as a predisposing condition for the development of thoracic aorta aneurysms, the role of blood pressure (BP) as determinant of aortic root enlargement is still controversial...
November 22, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27865507/plasma-protein-and-supplemental-isoleucine-in-milk-replacers-for-dairy-calves
#12
K M Vasquez, S Y Morrison, J M Campbell, J K Drackley
We measured the effects of milk replacers containing 0, 33, 66, or 100% of the total replaceable whey protein as bovine plasma protein (PP), without or with Ile supplementation, on the intake, growth, and health of 124 male Holstein calves for 35 d. Milk replacers were formulated to contain 18% crude protein and 20% fat, with contents of Lys and Met equalized. When fed to calves at 1.5% of body weight (dry matter basis) under thermoneutral conditions, diets were predicted to allow average daily gains of 0.55 kg/d based on metabolizable energy or 0...
November 16, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27834656/automated-detection-of-atrial-fibrillation-based-on-time-frequency-analysis-of-seismocardiagrams
#13
Tero Hurnanen, Eero Lehtonen, Mojtaba Jafari Tadi, Tom Kuusela, Tuomas Kiviniemi, Antti Saraste, Tuija Vasankari, Juhani Airaksinen, Tero Koivisto, Mikko Pankaala
In this paper, a novel method to detect atrial fibrillation from a seismocardiogram (SCG) is presented. The proposed method is based on linear classification of the spectral entropy and a heart rate variability index computed from the SCG. The performance of the developed algorithm is demonstrated on data gathered from 13 patients in clinical setting. After motion artefact removal, in total 119 minutes of AFib data and 126 minutes of sinus rhythm data were considered for automated atrial fibrillation detection...
November 4, 2016: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/27826247/modulations-of-heart-rate-ecg-and-cardio-respiratory-coupling-observed-in-polysomnography
#14
REVIEW
Thomas Penzel, Jan W Kantelhardt, Ronny P Bartsch, Maik Riedl, Jan F Kraemer, Niels Wessel, Carmen Garcia, Martin Glos, Ingo Fietze, Christoph Schöbel
The cardiac component of cardio-respiratory polysomnography is covered by ECG and heart rate recordings. However, their evaluation is often underrepresented in summarizing reports. As complements to EEG, EOG, and EMG, these signals provide diagnostic information for autonomic nervous activity during sleep. This review presents major methodological developments in sleep research regarding heart rate, ECG, and cardio-respiratory couplings in a chronological (historical) sequence. It presents physiological and pathophysiological insights related to sleep medicine obtained by new technical developments...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27809785/association-between-autonomic-nervous-dysfunction-and-cellular-inflammation-in-end-stage-renal-disease
#15
Eric Seibert, Kristina Zohles, Christof Ulrich, Alexander Kluttig, Sebastian Nuding, Jan A Kors, Cees A Swenne, Karl Werdan, Roman Fiedler, Matthias Girndt
BACKGROUND: Alterations in autonomic nervous function are common in hemodialysis (HD) patients. Sympathetic as well as parasympathetic activation may be associated with immune and inflammatory responses. We intended to confirm a role of autonomous dysregulation for inflammation in HD patients. METHODS: 30 HD patients (including 15 diabetics) and 15 healthy controls were studied for heart rate variability (HRV) using 5 min ECG recordings. Heart rate variability was estimated by time-domain parameters (the standard deviation of the RR intervals (SDNN) and the percentage of pairs of adjacent RR intervals differing by >50 ms (pNN50)) and frequency-domain-analysis (high- and low-frequency variation of RR intervals, HF and LF)...
November 3, 2016: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/27781180/a-pilot-study-examining-the-effects-of-low-volume-high-intensity-interval-training-and-continuous-low-to-moderate-intensity-training-on-quality-of-life-functional-capacity-and-cardiovascular-risk-factors-in-cancer-survivors
#16
Kellie Toohey, Kate L Pumpa, Leonard Arnolda, Julie Cooke, Desmond Yip, Paul S Craft, Stuart Semple
PURPOSE: The aim of this study was to evaluate the effects of low-volume high-intensity interval training and continuous low to moderate intensity training on quality of life, functional capacity and cardiovascular disease risk factors in cancer survivors. METHODS: Cancer survivors within 24 months post-diagnosis were randomly assigned into the low-volume high-intensity interval training group (n = 8) or the continuous low to moderate intensity training group (n = 8) group for 36 sessions (12 weeks) of supervised exercise...
2016: PeerJ
https://www.readbyqxmd.com/read/27774722/heart-transplant-outcomes-in-recipients-of-centers-for-disease-control-cdc-high-risk-donors
#17
Athanasios Tsiouris, Lynn Wilson, Rajesh B Sekar, Abeel A Mangi, James J Yun
BACKGROUND: A lack of donor hearts remains a major limitation of heart transplantation. Hearts from Centers for Disease Control (CDC) high-risk donors can be utilized with specific recipient consent. However, outcomes of heart transplantation with CDC high-risk donors are not well known. We sought to define outcomes, including posttransplant hepatitis and human immunodeficiency virus (HIV) status, in recipients of CDC high-risk donor hearts at our institution. METHODS: All heart transplant recipients from August 2010 to December 2014 (n = 74) were reviewed...
December 2016: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/27770662/menstrual-cycle-related-variation-in-autonomic-nervous-system-functioning-in-women-in-the-early-menopausal-transition-with-and-without-insomnia-disorder
#18
Massimiliano de Zambotti, John Trinder, Ian M Colrain, Fiona C Baker
Insomnia is considered a hyperarousal disorder, in which several psychophysiological domains including the autonomic nervous system (ANS) are over-activated, potentially contributing to increased risk for cardiovascular (CV) disease. Here, we aimed to determine whether insomnia that develops in the context of the transition to menopause (menopausal transition insomnia, MTI) is similarly characterized by autonomic arousal. We also took into account modulation of the ANS by the hormonal changes of the menstrual cycle, a factor that has not previously been considered in studies on insomnia...
January 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27754772/determinants-of-improvement-in-left-ventricular-diastolic-function-following-a-1-year-lifestyle-modification-program-in-abdominally-obese-men-with-features-of-the-metabolic-syndrome
#19
Jacinthe Leclerc, Marie Arsenault, Jean-Pierre Després, Patrice Brassard, Valérie Gaudreault, Jean Bergeron, Natalie Alméras, Angelo Tremblay, Audrey Auclair, Marie-Kristelle Ross, Stéphanie Denault-Bissonnette, Paul Poirier
BACKGROUND: Abdominal obesity and presence of the metabolic syndrome (MetS) are associated with cardiac abnormalities. Among those, left ventricular diastolic dysfunction (LVDD) is the most frequently encountered in clinical practice. Few studies evaluated the reversibility of LVDD by an approach promoting lifestyle modifications in abdominally obese subjects with MetS. METHODS: We assessed the impact of a 1-year lifestyle modification program combining nutritional and physical activity counseling on LVDD and metabolic profile of abdominally obese men with MetS...
December 2016: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/27754179/ed-08-3-application-of-abp-monitoring-in-the-management-of-pediatric-hypertension
#20
Midori Awazu
ABP is more reliable and reproducible than casual BP, enables computation of the mean, daytime, night-time ABP, and 24-h pulse pressure, detects white coat effect or reversed white coat effect, and provides information regarding diurnal BP pattern as well as BP variability. ABP correlates better with target-organ damage than casual BP. ABPM is now widely used also in children. Increasing age and higher mean BP are factors that improve the success rate of ABPM. There is a guideline from American Heart Association to standardize the use of ABPM in children, including the detailed recommendations for the use of ABPM and for the interpretation of the data...
September 2016: Journal of Hypertension
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