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Author : Sylvain Laborde,Julian F. Thayer,Emma Mosley,Clint Bellenger
Publisher : Frontiers Media SA
Page : 454 pages
File Size : 54,6 Mb
Release : 2022-04-25
Category : Science
ISBN : 9782889749782
Author : Karin Trimmel,Jerzy Sacha,Heikki Veli Huikuri
Publisher : Frontiers Media SA
Page : 168 pages
File Size : 41,5 Mb
Release : 2015-10-07
Category : Electronic book
ISBN : 9782889196524
Over the last decades, assessment of heart rate variability (HRV) has increased in various fields of research. HRV describes changes in heartbeat intervals, which are caused by autonomic neural regulation, i.e. by the interplay of the sympathetic and the parasympathetic nervous systems. The most frequent application of HRV is connected to cardiological issues, most importantly to the monitoring of post-myocardial infarction patients and the prediction of sudden cardiac death. Analysis of HRV is also frequently applied in relation to diabetes, renal failure, neurological and psychiatric conditions, sleep disorders, psychological phenomena such as stress, as well as drug and addiction research including alcohol and smoking. The widespread application of HRV measurements is based on the fact that they are noninvasive, easy to perform, and in general reproducible – if carried out under standardized conditions. However, the amount of parameters to be analysed is still rising. Well-established time domain and frequency domain parameters are discussed controversially when it comes to their physiological interpretation and their psychometric properties like reliability and validity, and the sensitivity to cardiovascular properties of the variety of parameters seems to be a topic for further research. Recently introduced parameters like pNNxx and new dynamic methods such as approximate entropy and detrended fluctuation analysis offer new potentials and warrant standardization. However, HRV is significantly associated with average heart rate (HR) and one can conclude that HRV actually provides information on two quantities, i.e. on HR and its variability. It is hard to determine which of these two plays a principal role in the clinical value of HRV. The association between HRV and HR is not only a physiological phenomenon but also a mathematical one which is due to non-linear (mathematical) relationship between RR interval and HR. If one normalizes HRV to its average RR interval, one may get ‘pure’ variability free from the mathematical bias. Recently, a new modification method of the association between HRV and HR has been developed which enables us to completely remove the HRV dependence on HR (even the physiological one), or conversely enhance this dependence. Such an approach allows us to explore the HR contribution to the clinical significance of HRV, i.e. whether HR or its variability plays a main role in the HRV clinical value. This Research Topic covers recent advances in the application of HRV, methodological issues, basic underlying mechanisms as well as all aspects of the interaction between HRV and HR.
Author : Sasha Hope
Publisher : Singing Dragon
Page : 258 pages
File Size : 48,9 Mb
Release : 2023-12-21
Category : Health & Fitness
ISBN : 9781839971167
The vagus nerve is responsible for the regulation of all our internal organ functions. When it is damaged, the wide-ranging impact on our nervous system can manifest in a multitude of ways, including anxiety, hormonal imbalances, gastrointestinal distress, and vertigo. Based on current research into the vagus nerve and vagus nerve stimulation, this practical guide addresses a crucial missing link in healthcare and functional medicine by providing an innovative protocol on the management of anxiety and vagus nerve dysfunction through nutrition, exercise, and lifestyle. With a holistic, whole-person approach, this protocol bridges the divide between the physical and the psychological, providing a holistic approach that can be applied widely across various disciplines within healthcare, bodywork, and mental health. It provides detailed theory and is supplemented with an abundance of practical guidance including various recipes whilst also helping practitioners understand how clients may transition to a more sustainable, long-term protocol.
Author : Anonim
Publisher : Unknown
Page : 0 pages
File Size : 40,6 Mb
Release : 2015
Category : Electronic
ISBN : OCLC:1368434955
Over the last decades, assessment of heart rate variability (HRV) has increased in various fields of research. HRV describes changes in heartbeat intervals, which are caused by autonomic neural regulation, i.e. by the interplay of the sympathetic and the parasympathetic nervous systems. The most frequent application of HRV is connected to cardiological issues, most importantly to the monitoring of post-myocardial infarction patients and the prediction of sudden cardiac death. Analysis of HRV is also frequently applied in relation to diabetes, renal failure, neurological and psychiatric conditions, sleep disorders, psychological phenomena such as stress, as well as drug and addiction research including alcohol and smoking. The widespread application of HRV measurements is based on the fact that they are noninvasive, easy to perform, and in general reproducible - if carried out under standardized conditions. However, the amount of parameters to be analysed is still rising. Well-established time domain and frequency domain parameters are discussed controversially when it comes to their physiological interpretation and their psychometric properties like reliability and validity, and the sensitivity to cardiovascular properties of the variety of parameters seems to be a topic for further research. Recently introduced parameters like pNNxx and new dynamic methods such as approximate entropy and detrended fluctuation analysis offer new potentials and warrant standardization. However, HRV is significantly associated with average heart rate (HR) and one can conclude that HRV actually provides information on two quantities, i.e. on HR and its variability. It is hard to determine which of these two plays a principal role in the clinical value of HRV. The association between HRV and HR is not only a physiological phenomenon but also a mathematical one which is due to non-linear (mathematical) relationship between RR interval and HR. If one normalizes HRV to its average RR interval, one may get 'pure' variability free from the mathematical bias. Recently, a new modification method of the association between HRV and HR has been developed which enables us to completely remove the HRV dependence on HR (even the physiological one), or conversely enhance this dependence. Such an approach allows us to explore the HR contribution to the clinical significance of HRV, i.e. whether HR or its variability plays a main role in the HRV clinical value. This Research Topic covers recent advances in the application of HRV, methodological issues, basic underlying mechanisms as well as all aspects of the interaction between HRV and HR.
Author : Shelby Walters
Publisher : Nova Science Publishers
Page : 0 pages
File Size : 42,5 Mb
Release : 2015
Category : Cardiovascular system
ISBN : 1634637364
Heart rate variability (HRV) has become a popular method to study autonomic modulation of the cardiovascular system. Cardiovascular health depends on the proper functioning of several physiological systems, including the autonomic nervous system, which exerts its function via a complex interaction between its two branches: sympathetic and parasympathetic. Additionally, heart rate variability has been widely applied in basic and clinical research studies for describing the extent of sinus arrhythmia, and for assessing the function of cardiac autonomic regulation quantitatively. In other words, it is a mirror of the balance of sympathetic and vagal activity. This book discusses the prognostic significance, risk factors and clinical applications of heart rate variability.
Author : Reiner Buchhorn
Publisher : Nova Science Publishers
Page : 141 pages
File Size : 52,7 Mb
Release : 2015-04-16
Category : Autonomic nervous system
ISBN : 1634638913
Based upon the hypothesis that prognosis in childhood heart failure depends on autonomic dysfunction, the author introduced a new heart failure model and a medical therapy with beta-blockers in 1996. The author used the analysis of heart rate variability (HRV) in 24 hours Holter ECG's for the understanding of the pathophysiology of childhood heart failure and for objective control of medical therapy. The success of this clinical model was the inspiration of a new approach to mental disease in childhood. In the last decades, an increase of new paediatric problems requiring medical care like eating disorders, behavioural and attention problems has been observed. All these diseases are related to autonomic dysfunction and have a high impact on cardiovascular prognosis. Based upon the hypothesis that behavioural problems are accompanied by changes in the autonomic nervous system, the author performed analysis of HRV in 24 hours Holter ECG's in these patient groups: healthy children with respect to school affiliation; a historical control group from literature published in 1997; attention deficit disorder with and without hyperactivity; anorexia nervosa and obesity. This data was compared to children with an increased cardiovascular risk due to congenital heart disease. In order to analyse the effect of autonomic function on human growth, we measured HRV in children with growth failure. A new HRV Score was established for the comparison of autonomic function in different age groups. The author could demonstrate a decrease of vagal activity in healthy children in children of today and speculate that insufficient vagal maturation may be a reason for an increasing prevalence of mental and cardiovascular disease. Looking for the reason of this vagal shift, caloric over nutrition, omega-3-fatty acid deficiency, high intensity of information and communication technology usage and some environmental toxins reduce HRV in childhood.
Author : Constantino Antonio García Martínez,Abraham Otero Quintana,Xosé A. Vila,María José Lado Touriño,Leandro Rodríguez-Liñares,Jesús María Rodríguez Presedo,Arturo José Méndez Penín
Publisher : Springer
Page : 0 pages
File Size : 42,8 Mb
Release : 2017-10-02
Category : Medical
ISBN : 3319653547
This book introduces readers to the basic concepts of Heart Rate Variability (HRV) and its most important analysis algorithms using a hands-on approach based on the open-source RHRV software. HRV refers to the variation over time of the intervals between consecutive heartbeats. Despite its apparent simplicity, HRV is one of the most important markers of the autonomic nervous system activity and it has been recognized as a useful predictor of several pathologies. The book discusses all the basic HRV topics, including the physiological contributions to HRV, clinical applications, HRV data acquisition, HRV data manipulation and HRV analysis using time-domain, frequency-domain, time-frequency, nonlinear and fractal techniques. Detailed examples based on real data sets are provided throughout the book to illustrate the algorithms and discuss the physiological implications of the results. Offering a comprehensive guide to analyzing beat information with RHRV, the book is intended for masters and Ph.D. students in various disciplines such as biomedical engineering, human and veterinary medicine, biology, and pharmacy, as well as researchers conducting heart rate variability analyses on both human and animal data.
Author : Jerzy Sacha,Bozena Werner,Piotr Jerzy Jeleń,Jakub S. Gąsior,George E. Billman
Publisher : Frontiers Media SA
Page : 187 pages
File Size : 54,8 Mb
Release : 2019-11-27
Category : Electronic
ISBN : 9782889631988
Author : Rollin McCraty
Publisher : Unknown
Page : 114 pages
File Size : 42,8 Mb
Release : 2015
Category : Electronic
ISBN : 1513606360
Author : International Commission on the Futures of Education
Publisher : UNESCO Publishing
Page : 185 pages
File Size : 55,6 Mb
Release : 2021-11-06
Category : Political Science
ISBN : 9789231004780
The interwoven futures of humanity and our planet are under threat. Urgent action, taken together, is needed to change course and reimagine our futures.
Author : King K. Holmes,Stefano Bertozzi,Barry R. Bloom,Prabhat Jha
Publisher : World Bank Publications
Page : 506 pages
File Size : 47,6 Mb
Release : 2017-11-06
Category : Medical
ISBN : 9781464805257
Infectious diseases are the leading cause of death globally, particularly among children and young adults. The spread of new pathogens and the threat of antimicrobial resistance pose particular challenges in combating these diseases. Major Infectious Diseases identifies feasible, cost-effective packages of interventions and strategies across delivery platforms to prevent and treat HIV/AIDS, other sexually transmitted infections, tuberculosis, malaria, adult febrile illness, viral hepatitis, and neglected tropical diseases. The volume emphasizes the need to effectively address emerging antimicrobial resistance, strengthen health systems, and increase access to care. The attainable goals are to reduce incidence, develop innovative approaches, and optimize existing tools in resource-constrained settings.
Author : Netexplo
Publisher : UNESCO Publishing
Page : 344 pages
File Size : 50,5 Mb
Release : 2024-06-15
Category : Electronic
ISBN : 9789231003172
Author : Elçi, Sirin,UNESCO
Publisher : UNESCO Publishing
Page : 92 pages
File Size : 55,8 Mb
Release : 2020-10-14
Category : Political Science
ISBN : 9789231004018
Author : Christine L. Madliger,Craig E. Franklin,Oliver P. Love,Steven J. Cooke
Publisher : Oxford University Press, USA
Page : 361 pages
File Size : 50,8 Mb
Release : 2020
Category : Science
ISBN : 9780198843610
Conservation physiology is a rapidly expanding, multidisciplinary field that utilizes physiological knowledge and tools to understand and solve conservation challenges. This novel text provides the first consolidated overview of its scope, purpose, and applications, with a focus on wildlife. It outlines the major avenues and advances by which conservation physiology is contributing to the monitoring, management, and restoration of wild animal populations. This book also defines opportunities for further growth in the field and identifies critical areas for future investigation. By using a series of global case studies, contributors illustrate how approaches from the conservation physiology toolbox can tackle a diverse range of conservation issues including the monitoring of environmental stress, predicting the impact of climate change, understanding disease dynamics, improving captive breeding, and reducing human-wildlife conflict. Moreover, by acting as practical road maps across a diversity of sub-disciplines, these case studies serve to increase the accessibility of this discipline to new researchers. The diversity of taxa, biological scales, and ecosystems highlighted illustrate the far-reaching nature of the discipline and allow readers to gain an appreciation for the purpose, value, applicability, and status of the field of conservation physiology. Conservation Physiology is an accessible supplementary textbook suitable for graduate students, researchers, and practitioners in the fields of conservation science, eco-physiology, evolutionary and comparative physiology, natural resources management, ecosystem health, veterinary medicine, animal physiology, and ecology.
Author : Shabbir Syed-Abdul,Luis Fernandez Luque,Pei-Yun Sabrina Hsueh,Juan M. García-Gomez,Begoña Garcia-Zapirain
Publisher : MDPI
Page : 498 pages
File Size : 47,8 Mb
Release : 2020-06-17
Category : Medical
ISBN : 9783039363506
This book provides a collection of comprehensive research articles on data analytics and applications of wearable devices in healthcare. This Special Issue presents 28 research studies from 137 authors representing 37 institutions from 19 countries. To facilitate the understanding of the research articles, we have organized the book to show various aspects covered in this field, such as eHealth, technology-integrated research, prediction models, rehabilitation studies, prototype systems, community health studies, ergonomics design systems, technology acceptance model evaluation studies, telemonitoring systems, warning systems, application of sensors in sports studies, clinical systems, feasibility studies, geographical location based systems, tracking systems, observational studies, risk assessment studies, human activity recognition systems, impact measurement systems, and a systematic review. We would like to take this opportunity to invite high quality research articles for our next Special Issue entitled “Digital Health and Smart Sensors for Better Management of Cancer and Chronic Diseases” as a part of Sensors journal.
