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Heart rate variability and health

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https://www.readbyqxmd.com/read/28080048/wearable-sensors-for-personal-monitoring-and-estimation-of-inhaled-traffic-related-air-pollution-evaluation-of-methods
#1
Evi Dons, Michelle Laeremans, Juan Pablo Orjuela, Ione Avila-Palencia, Glòria Carrasco-Turigas, Tom Cole-Hunter, Esther Anaya-Boig, Arnout Standaert, Patrick De Boever, Tim S Nawrot, Thomas Götschi, Audrey de Nazelle, Mark J Nieuwenhuijsen, Luc Int Panis
Physical activity and ventilation rates have an effect on an individual's dose and may be important to consider in exposure-response relationships; however, these factors are often ignored in environmental epidemiology studies. The aim of this study was to evaluate methods to estimate the inhaled dose of air pollution and understand variability, in the absence of a true gold standard metric. Five types of methods were identified: (1) methods using (physical) activity types; (2) methods based on energy expenditure, METs (metabolic equivalents of task) and oxygen consumption; (3) methods based on heart rate or (4) breathing rate; and (5) methods that combine heart and breathing rate...
January 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28077722/higher-heart-rate-variability-is-associated-with-ventromedial-prefrontal-cortex-activity-and-increased-resistance-to-temptation-in-dietary-self-control-challenges
#2
Silvia U Maier, Todd A Hare
: Higher levels of self-control in decision making have been linked to better psychosocial and physical health. A similar link to health outcomes has been reported for heart-rate variability (HRV), a marker of physiological flexibility. Here, we sought to link these two, largely separate, research domains by testing the hypothesis that greater HRV would be associated with better dietary self-control in humans. Specifically, we examined whether total HRV at sedentary rest (measured as the SD of normal-to-normal intervals) can serve as a biomarker for the neurophysiological adaptability that putatively underlies self-controlled behavior...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28057898/a-retrospective-study-of-degenerative-mitral-valve-disease-in-small-breed-dogs-survival-and-prognostic-variables
#3
Hyun-Tae Kim, Sei-Myoung Han, Woo-Jin Song, Boeun Kim, Mincheol Choi, Junghee Yoon, Hwa-Young Youn
Small-breed (n= 168 dogs; weight < 15 kg) diagnosed with MMVD based on a routine clinical examination, radiology, an electrocardiogram, and echocardiography at the Seoul National University Veterinary Medical Teaching Hospital were included. The survival periods were ascertained and a significant difference was observed in the survival rates between the International Small Animal Cardiac Health Council classes. The mean follow-up period was 14.3 ± 12.1 months. Univariate analysis revealed that dyspnea, pulmonary edema, and vertebral heart score were significantly associated with the survival times (P < 0...
January 4, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/28055987/heart-beat-classification-from-single-lead-ecg-using-the-synchrosqueezing-transform
#4
Christophe L Herry, Martin Frasch, Andrew Je Seely, Hau-Tieng Wu
The processing of ECG signal provides a wealth of information on cardiac function and overall cardiovascular health. While multi-lead ECG recordings are often necessary for a proper assessment of cardiac rhythms, they are not always available or practical, for example in fetal ECG applications. Moreover, a wide range of small non-obtrusive single-lead ECG ambulatory monitoring devices are now available, from which heart rate variability (HRV) and other health-related metrics are derived. Proper beat detection and classification of abnormal rhythms is important for reliable HRV assessment and can be challenging in single-lead ECG monitoring devices...
January 5, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28047237/tu-h-campus-tep1-01-variable-beam-fractionation-for-sabr
#5
A Modiri, A Sawant
PURPOSE: In current conventionally-fractionated as well as hypofractionated 3D conformal radiotherapy (CRT), the same beam arrangement is employed from fraction to fraction. We challenge this notion and postulate that by varying the beam arrangement between fractions we can achieve greater sparing of organs at risk (OARs) while maintaining PTV coverage. We use an inverse planning strategy using a swarm intelligence-based global optimization algorithm to exploit the additional degree of freedom represented by inter-fractional variation in beam angles...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045306/examining-the-association-between-perceived-discrimination-and-heart-rate-variability-in-african-americans
#6
LaBarron K Hill, Lori S Hoggard, Ashley S Richmond, DeLeon L Gray, Dewayne P Williams, Julian F Thayer
OBJECTIVE: Previous research attempting to delineate the role of discrimination in racial/ethnic disparities in hypertension has focused largely on blood pressure, which is chiefly governed by the sympathetic branch of the autonomic nervous system. Consequently, few studies have considered the role of the parasympathetic branch and particularly its regulation of the heart via the vagus nerve. METHOD: In the present cross-sectional study, we employed hierarchical linear regressions to examine associations between perceived ethnic discrimination and resting heart rate variability (HRV), an important biomarker of parasympathetic cardiac modulation and overall health, in a sample (N = 103) of young, healthy African American participants (58% female, Mage = 19...
January 2017: Cultural Diversity & Ethnic Minority Psychology
https://www.readbyqxmd.com/read/28038819/patterns-of-inpatient-care-for-acute-myocardial-infarction-and-30-day-3-month-and-1-year-cardiac-diseases-readmission-rates-in-spain
#7
Luis Rodriguez-Padial, Francisco J Elola, Cristina Fernández-Pérez, José L Bernal, Andrés Iñiguez, José V Segura, Vicente Bertomeu
BACKGROUND: Acute myocardial infarction (AMI) is a common cause of hospital discharges and readmissions. Readmissions may indicate poor patient care and avoidable health expenditure, being key in quality improvement strategies. Our aim was to analyse cardiac diseases (CDs) readmissions in patients with AMI in Spain. METHODS: A retrospective analysis of 33,538 hospital discharges with AMI being the "principal diagnosis" at hospitals of the Spanish National Health System in 2012 was performed using administrative data...
December 22, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/28035294/the-association-between-treatment-frequency-and-treatment-outcome-for-cardiovascular-surgeries
#8
Ji Suk Choi, Choon Seon Park, Myunghwa Kim, Myo Jeong Kim, Kun Sei Lee, Sung Bo Sim, Hyun Keun Chee, Nam Hee Park, Sung Min Park
BACKGROUND: This study analyzed the association between the volume of heart surgeries and treatment outcomes for hospitals in the last five years. METHODS: Hospitals that perform heart surgeries were chosen throughout Korea as subjects using from the Health Insurance Review and Assessment Service. The treatment outcome of the heart surgeries was defined as the mortality within 30 postoperative days, while the annual volume of the surgeries was categorized. Logistic regression was used as the statistical analysis method, and the impacts of the variables on the heart surgery treatment outcomes were then analyzed...
December 2016: Korean Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28034580/canadian-cardiovascular-society-canadian-heart-rhythm-society-2016-implantable-cardioverter-defibrillator-guidelines
#9
Matthew Bennett, Ratika Parkash, Pablo Nery, Mario Sénéchal, Blandine Mondesert, David Birnie, Laurence D Sterns, Claus Rinne, Derek Exner, François Philippon, Debra Campbell, Jafna Cox, Paul Dorian, Vidal Essebag, Andrew Krahn, Jaimie Manlucu, Franck Molin, Michael Slawnych, Mario Talajic
Sudden cardiac death is a major public health issue in Canada. However, despite the overwhelming evidence to support the use of implantable cardioverter defibrillators (ICDs) in the prevention of cardiac death there remains significant variability in implantation rates across Canada. Since the most recent Canadian Cardiovascular Society position statement on ICD use in Canada in 2005, there has been a plethora of new scientific information to assist physicians in their discussions with patients considered for ICD implantation to prevent sudden cardiac death due to ventricular arrhythmias...
October 6, 2016: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28033163/a-retrospective-comparison-of-home-telehealth-and-nursing-care-with-or-without-rehabilitation-therapy-on-rehospitalization-rates-of-individuals-with-heart-failure
#10
Stacy Martin, Bill Anderson, Jennifer L Vincenzo, Sajid Yousuf Zai
PURPOSE: Congestive heart failure (CHF) is the most common reason for rehospitalization among the aging population, accounting for one-fifth of all hospital admissions. To date, there is no research comparing the rehospitalization rates between patients with CHF (PWCHF) who receive telehealth and home health nursing care versus a multidisciplinary team consisting of telehealth, home nursing, physical therapy (PT), and/or occupational therapy (OT). METHODS: A retrospective analysis was performed with 132 Medicare Part A home health patients discharged from an inpatient setting with a primary or secondary diagnosis of CHF receiving daily telehealth over the course of 1 year...
December 28, 2016: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28030615/does-mental-health-status-influence-susceptibility-to-the-physiologic-effects-of-air-pollution-a-population-based-study-of-canadian-children
#11
Robert E Dales, Sabit Cakmak
BACKGROUND: Both air pollution exposure and the presence of mental illness are associated with an increased risk of physical illness. OBJECTIVE: To determine whether or not children with less favourable mental health are more susceptible to pulmonary and cardiovascular effects of ambient air pollution, compared to those who are mentally healthy. METHODS: We carried out a cross-sectional study of 1,883 children between the ages of 6 and 17 years of age who participated in the Canadian Health Measures population survey between 2007 and 2009...
2016: PloS One
https://www.readbyqxmd.com/read/28025593/tobacco-use-and-its-health-effects-among-professional-athletes-in-qatar
#12
Zaina Chaabane, Zsolt Murlasits, Ziyad Mahfoud, Ruben Goebel
The objective of the study was to determine the effects of tobacco use on selected markers of health and lung function in professional athletes. A total of 108 male professional athletes participated in the study from ten ball game teams in the same sport league in Qatar (age = 26.4 ± 5.1 yrs, height = 190.6 ± 11.9 cm, and weight = 91.5 ± 16.4 kg). The athletes have been playing professionally for about 6.3 years on average. In addition to demographic and tobacco use status, the following clinical variables were measured: resting blood pressure, heart rate, FVC, FEV1 sec, and PEF...
2016: Canadian Respiratory Journal: Journal of the Canadian Thoracic Society
https://www.readbyqxmd.com/read/28017263/effects-of-short-and-prolonged-transcutaneous-vagus-nerve-stimulation-on-heart-rate-variability-in-healthy-subjects
#13
M De Couck, R Cserjesi, R Caers, W P Zijlstra, D Widjaja, N Wolf, O Luminet, J Ellrich, Y Gidron
The vagus nerve is strategically located in the body, and has multiple homeostatic and health-promoting effects. Low vagal activity predicts onset and progression of diseases. These are the reasons to activate this nerve. This study examined the effects of transcutaneous vagus nerve stimulation (t-VNS) on a main index of vagal activity, namely heart rate variability (HRV). In Study 1, we compared short (10min) left versus right ear t-VNS versus sham (no stimulation) in a within-subjects experimental design...
November 30, 2016: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/27982347/reference-values-for-the-six-minute-walk-test-in-healthy-children-and-adolescents-a-systematic-review
#14
Lucas de Assis Pereira Cacau, Valter Joviniano de Santana-Filho, Luana G Maynard, Mansueto Gomes, Marcelo Fernandes, Vitor Oliveira Carvalho
Objective: The aim of the study is to compare the available reference values and the six-minute walk test equations in healthy children/adolescents. Our systematic review was planned and performed in accordance with the PRISMA guidelines. We included all studies that established reference values for the six-minute walk test in healthy children/adolescents. Methods: To perform this review, a research was performed in PubMed, EMBASE (via SCOPUS) and Cochrane (LILACS), Bibliographic Index Spanish in Health Sciences, Organization Collection Pan-American Health Organization, Publications of the World Health Organization and Scientific Electronic Library Online (SciELO) via Virtual Health Library until June 2015 without language restriction...
September 2016: Brazilian Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/27973617/quantifying-geographic-variation-in-health-care-outcomes-in-the-united-states-before-and-after-risk-adjustment
#15
Barry L Rosenberg, Joshua A Kellar, Anna Labno, David H M Matheson, Michael Ringel, Paige VonAchen, Richard I Lesser, Yue Li, Justin B Dimick, Atul A Gawande, Stefan H Larsson, Hamilton Moses
BACKGROUND: Despite numerous studies of geographic variation in healthcare cost and utilization at the local, regional, and state levels across the U.S., a comprehensive characterization of geographic variation in outcomes has not been published. Our objective was to quantify variation in US health outcomes in an all-payer population before and after risk-adjustment. METHODS AND FINDINGS: We used information from 16 independent data sources, including 22 million all-payer inpatient admissions from the Healthcare Cost and Utilization Project (which covers regions where 50% of the U...
2016: PloS One
https://www.readbyqxmd.com/read/27965967/physiological-and-behavioral-responses-of-dairy-cattle-to-the-introduction-of-robot-scrapers
#16
Renate L Doerfler, Christina Lehermeier, Heike Kliem, Erich Möstl, Heinz Bernhardt
Autonomous mobile robot scrapers are increasingly used in order to clean the floors on dairy farms. Given the complexity of robot scraper operation, stress may occur in cows due to unpredictability of the situation. Experiencing stress can impair animal welfare and, in the long term, the health and milk production of the cows. Therefore, this study addressed potential stress responses of dairy cattle to the robot scraper after introducing the autonomous mobile machine. Thirty-six cows in total were studied on three different farms to explore possible modifications in cardiac function, behavior, and adrenocortical activity...
2016: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/27960229/automated-telephone-communication-systems-for-preventive-healthcare-and-management-of-long-term-conditions
#17
REVIEW
Pawel Posadzki, Nikolaos Mastellos, Rebecca Ryan, Laura H Gunn, Lambert M Felix, Yannis Pappas, Marie-Pierre Gagnon, Steven A Julious, Liming Xiang, Brian Oldenburg, Josip Car
BACKGROUND: Automated telephone communication systems (ATCS) can deliver voice messages and collect health-related information from patients using either their telephone's touch-tone keypad or voice recognition software. ATCS can supplement or replace telephone contact between health professionals and patients. There are four different types of ATCS: unidirectional (one-way, non-interactive voice communication), interactive voice response (IVR) systems, ATCS with additional functions such as access to an expert to request advice (ATCS Plus) and multimodal ATCS, where the calls are delivered as part of a multicomponent intervention...
14, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27959833/adaptive-spectro-temporal-filtering-for-electrocardiogram-signal-enhancement
#18
Diana Tobon Vallejo, Tiago Falk
Advances in low-cost portable electrocardiogram (ECG) devices have opened doors for numerous new applications, including fitness tracking, remote health, and peak athletic performance monitoring, to name a few. Many such devices, however, have been shown to be highly contaminated by movement and/or muscle contraction artifacts, which in turn, can lead to erroneous heart rate and heart rate variability (HRV) analyses. Here, we propose a new denoising method based on adaptive spectrotemporal filtering for ECG enhancement...
December 9, 2016: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/27942158/changes-of-heart-rate-variability-and-prefrontal-oxygenation-during-tai-chi-practice-versus-arm-ergometer-cycling
#19
Xi Lu, Christina Wan-Ying Hui-Chan, William Wai-Nam Tsang
[Purpose] Exercise has been shown to improve cardiovascular fitness and cognitive function. Whether the inclusion of mind over exercise would increase parasympathetic control of the heart and brain activities more than general exercise at a similar intensity is not known. The aim of this study was to compare the effects of Tai Chi (mind-body exercise) versus arm ergometer cycling (body-focused exercise) on the heart rate variability and prefrontal oxygenation level. [Subjects and Methods] A Tai Chi master was invited to perform Tai Chi and arm ergometer cycling with similar exercise intensity on two separate days...
November 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27941217/implementation-and-verification-of-an-enhanced-algorithm-for-the-automatic-computation-of-rr-interval-series-derived-from-24%C3%A2-h-12-lead-ecgs
#20
Stefan Hagmair, Matthias C Braunisch, Martin Bachler, Christoph Schmaderer, Anna-Lena Hasenau, Axel Bauer, Kostantinos D Rizas, Siegfried Wassertheurer, Christopher C Mayer
An important tool in early diagnosis of cardiac dysfunctions is the analysis of electrocardiograms (ECGs) obtained from ambulatory long-term recordings. Heart rate variability (HRV) analysis became a significant tool for assessing the cardiac health. The usefulness of HRV assessment for the prediction of cardiovascular events in end-stage renal disease patients was previously reported. The aim of this work is to verify an enhanced algorithm to obtain an RR-interval time series in a fully automated manner. The multi-lead corrected R-peaks of each ECG lead are used for RR-series computation and the algorithm is verified by a comparison with manually reviewed reference RR-time series...
January 2017: Physiological Measurement
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