Download or read book Cardiac Inter Beat Interval and Atrial Fibrillation Detection Using Video Plethysmography written by Jairo Hernandez Guzman and published by . This book was released on 2016 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Facial videoplethysmography provides non-contact measurement of heart activity based on blood volume pulsations detected in facial tissue. Typically, the signal is extracted using a simple webcam followed by elaborated signal processing methods, and provides limited accuracy of time-domain characteristics. In this study, we explore the possibility of providing accurate time-domain pulse and inter-beat interval measurements using a high-quality image sensor camera and various signal processing approaches, and use these measurements to diagnose atrial fibrillation. We capture synchronized signals using a high- quality camera, a simple webcam, an earlobe photoplethysmography sensor, and a body-surface electrocardiogram from a large group of subjects, including subjects diagnosed with cardiac arrhythmias. All signals are processed using both blind source separation and color conversion. We then assess accuracy of IBI detection, heart rate variability estimation, and atrial fibrillation diagnose by comparing to a body-surface electrocardiogram. We present a new heart variability indicator for blood volume pulsating signals. Our results demonstrate that the accuracy of a facial VPG system is greatly improved when using a high-quality camera. Coupling the high-quality camera with color conversion from RGB to Hue provides a level of accuracy equivalent to that of commercially available photoplethysmography sensors, and offers a non-contact alternative to current technology for heart rate variability assessment and atrial fibrillation screening."--Abstract.

Download or read book Monitoring Of Inter Beat Intervals And Accuracy Of Atrial Fibrillation Detection With Wrist Photoplethysmography In Post Operative Patients written by Jarkko Harju and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: BACKGROUND: Atrial fibrillation (AF) causes marked risk for patients, while silent fibrillation may remain unnoticed if not suspected and screened. Development of comfortable yet accurate beat-to-beat heart rate (HR) monitoring with good AF detection sensitivity would facilitate screening and improve treatment. The purpose of this study was to evaluate whether a wrist-worn photoplethysmographic (PPG) device can be used to monitor beat-to-beat HR and to detect atrial fibrillation accurately during postoperative treatment.MATERIALS and METHODS:Thirty patients with multiple comorbidities scheduled to surgery and treated post-operatively at post anaesthesia care unit were recruited. Patients were recruited into two equal sized groups having either AF or sinus rhythm (SR). The group allocation was decided at the beginning of the measurement. Initially, one patient had an AF rhythm which was reversed to SR and therefore the patient was excluded from the final analysis. The monitoring was conducted during postoperative treatment and it included standard ECG and a wrist-worn PPG-based optical HR Monitor, (PulseOn ltd, Espoo, Finland) using green light. Inter-beat intervals (IBI) from the wrist PPG signals were compared to RR intervals obtained from the ECG readings. IBI values were further used to evaluate the AF or SR condition.RESULTS and DISCUSSION: 29 patients (15 with AF, 14 with sinus rhythm (SR), mean age 71.5y) were analysed. The average duration of each recording was 1.5 hours. The wrist PPG monitor had a very good beat detection accuracy. For the SR group, the mean absolute error (MAE) for IBI was 7.64ms. For the AF group, the MAE for IBI was 14.67ms. The AF detection sensitivity was 99.00% and specificity 92.96%. By discarding periods with movement artefact, the AF detection sensitivity was improved to 99.88% and specificity 99.92%. Figure 1 Bland-Altman Plot showing the comparison of Inter-beat interval between ECG and wrist measurement. The numbers indicate mean error and limits of agreement.CONCLUSIONS: Results suggest that wrist PPG measurement allows accurate IBI detection, which could be used for differentiating between SR and AF with very good sensitivity. By discarding the periods with artefacts, usually caused by motion, the performance was found excellent.

Download or read book Photoplethysmography written by Panicos A. Kyriacou and published by Academic Press. This book was released on 2021-11-03 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photoplethysmography: Technology, Signal Analysis, and Applications is the first comprehensive volume on the theory, principles, and technology (sensors and electronics) of photoplethysmography (PPG). It provides a detailed description of the current state-of-the-art technologies/optical components enabling the extreme miniaturization of such sensors, as well as comprehensive coverage of PPG signal analysis techniques including machine learning and artificial intelligence. The book also outlines the huge range of PPG applications in healthcare, with a strong focus on the contribution of PPG in wearable sensors and PPG for cardiovascular assessment. Presents the underlying principles and technology surrounding PPG Includes applications for healthcare and wellbeing Focuses on PPG in wearable sensors and devices Presents advanced signal analysis techniques Includes cutting-edge research, applications and future directions

Download or read book Atrial Fibrillation from an Engineering Perspective written by Leif Sörnmo and published by Springer. This book was released on 2018-05-15 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atrial Fibrillation from an Engineering Perspective provides an up-to-date overview of techniques developed for acquisition, modeling, and analysis of noninvasive, bioelectrical signals reflecting this common arrhythmia. Special emphasis is put on emerging technologies for monitoring of atrial fibrillation in connection with ischemic stroke, interventional ablation procedures, and pharmacological treatment, applications which all depend on the availability of techniques for detecting and characterizing episodes of paroxysmal atrial fibrillation. Detectors exploring both rhythm and morphology are described, as well as detectors confined to rhythm and better suited for low power implementation. A wide variety of approaches to modeling and characterization of atrial activity are described, emanating from a statistical and deterministic starting points. This book is suitable for graduate students, researchers, and engineers who want a comprehensive treatise of atrial fibrillation from an engineering perspective. It may be used for self-study, as a supplement to courses in signal processing, or as a modern monograph by researchers in the field of atrial fibrillation.

Download or read book Mobile Solutions and Their Usefulness in Everyday Life written by Sara Paiva and published by Springer. This book was released on 2018-12-11 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an insight into recent technological trends and innovations in solutions and platforms to improve mobility of visually impaired people. The authors’ goal is to help to contribute to the social and societal inclusion of the visually impaired. The book’s topics include, but are not limited to, obstacle detection systems, indoor and outdoor navigation, transportation sustainability systems, and hardware/devices to aid visually impaired people. The book has a strong focus on practical applications tested in a real environment. Applications include city halls, municipalities, and companies that must keep up to date with recent trends in platforms, methodologies and technologies to promote urban mobility. Also discuss are broader realms including education, health, electronics, tourism, and transportation. Contributors include a variety of researchers and practitioners around the world.

Download or read book Poincar Plot Methods for Heart Rate Variability Analysis written by Ahsan Habib Khandoker and published by Springer Science & Business Media. This book was released on 2013-08-15 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Poincaré plot (named after Henri Poincaré) is a popular two-dimensional visualization tool for dynamic systems due to its intuitive display of the dynamic properties of a system from a time series. This book presents the basis of Poincaré plot and focus especially on traditional and new methods for analysing the geometry, temporal and spatial dynamics disclosed by the Poincaré plot to evaluate heart rate variability (HRV). Mathematical descriptors of Poincaré plot have been developed to quantify the autonomic nervous system activity (sympathetic and parasympathetic modulation of heart rate). Poincaré plot analysis has also been used in various clinical diagnostic settings like diabetes, chronic heart failure, chronic renal failure and sleep apnea syndrome. The primary aims of quantification of the Poincaré plots are to discriminate healthy physiological systems from pathological conditions and to classify the stage of a disease. The HRV analysis by Poincaré plot has opened up ample opportunities for important clinical and research applications. Therefore, the present book can be used either for self-study, as a supplement to courses in linear and nonlinear systems, or as a modern monograph by researchers in this field of HRV analysis.

Download or read book A Text Book of Medical Instruments written by S. Ananthi and published by New Age International. This book was released on 2006 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: About the Book: This book has therefore subdivided the realm of medical instruments into the same sections like a text on physiology and introduces the basic early day methods well, before dealing with the details of present day instruments currently in

Download or read book Practical Digital Signal Processing written by Edmund Lai and published by Elsevier. This book was released on 2003-10-21 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to introduce the general area of Digital Signal Processing from a practical point of view with a working minimum of mathematics. The emphasis is placed on the practical applications of DSP: implementation issues, tricks and pitfalls. Intuitive explanations and appropriate examples are used to develop a fundamental understanding of DSP theory, laying a firm foundation for the reader to pursue the matter further. The reader will develop a clear understanding of DSP technology in a variety of fields from process control to communications. * Covers the use of DSP in different engineering sectors, from communications to process control * Ideal for a wide audience wanting to take advantage of the strong movement towards digital signal processing techniques in the engineering world * Includes numerous practical exercises and diagrams covering many of the fundamental aspects of digital signal processing

Download or read book Decision Making in Medicine written by Stuart B. Mushlin and published by Elsevier Health Sciences. This book was released on 2009-10-27 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: This popular reference facilitates diagnostic and therapeutic decision making for a wide range of common and often complex problems faced in outpatient and inpatient medicine. Comprehensive algorithmic decision trees guide you through more than 245 disorders organized by sign, symptom, problem, or laboratory abnormality. The brief text accompanying each algorithm explains the key steps of the decision making process, giving you the clear, clinical guidelines you need to successfully manage even your toughest cases. An algorithmic format makes it easy to apply the practical, decision-making approaches used by seasoned clinicians in daily practice. Comprehensive coverage of general and internal medicine helps you successfully diagnose and manage a full range of diseases and disorders related to women's health, emergency medicine, urology, behavioral medicine, pharmacology, and much more. A Table of Contents arranged by organ system helps you to quickly and easily zero in on the information you need. More than a dozen new topics focus on the key diseases and disorders encountered in daily practice. Fully updated decision trees guide you through the latest diagnostic and management guidelines.

Download or read book The Heart in Rheumatic Autoimmune and Inflammatory Diseases written by Udi Nussinovitch and published by Academic Press. This book was released on 2017-02-10 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prevalence of autoimmune diseases and rheumatic conditions is constantly increasing. Autoimmune diseases affect approximately 7-10% of the population of the United States, while more than 50,000,000 American adults suffer from some type of arthritis. The Heart in Rheumatic, Autoimmune and Inflammatory Diseases examines the complex mechanisms relating to cardiac diseases from a pathophysiological and clinical point of view. Autoimmune rheumatic diseases can affect the coronary vessels, myocardium, pericardium, heart valves and the conduction system. The diagnosis of these unique cardiac complications necessitates medical awareness and a high index of suspicion. Increased risk of advanced atherosclerosis plays a pivotal role in the development of cardiac diseases in systemic, rheumatic and autoimmune illnesses. Yet, other complex immune medicated mechanisms may contribute to the pathogenesis. Patients' optimal care requires coordination between the primary caregiver, the rheumatologist, immunologist and cardiologist. Screening for cardiovascular risk factors, recognition of high-risk patients and identification of subclinical cardiac conditions are of great importance. Moreover, regulation of inflammation, as well as abnormal immune responses and the initiation of early treatments should be the focus of patient management. A continuous attempt to identify novel therapeutic targets and change the natural history of the underlying disease and its cardiac manifestations is in progress. The book aims at providing the readers with a state of the art collection of up to date information regarding clinically important topics based on experts' perspectives. This book was a result of an extended coordinated collaboration of one-hundred and fifty-four distinguished scientists from thirty-one countries around the globe. A review of common, as well as unusual (yet clinically significant) medical cardiac complications of prevalent rheumatic, autoimmune and inflammatory diseases. Focuses on aspects of pathophysiological processes, clinical presentations, screening tests, prognostic implications and novel therapeutic approaches. Presents an up-to-date “level of evidence” and “strengths of recommendations” for suggested therapies and reviews all randomized clinical trials, meta-analyses and other supporting published clinical findings.

Download or read book Handbook of Cardiac Anatomy Physiology and Devices written by Paul A. Iaizzo and published by Springer. This book was released on 2015-11-13 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the latest information on the anatomic features, underlying physiologic mechanisms, and treatments for diseases of the heart. Key chapters address animal models for cardiac research, cardiac mapping systems, heart-valve disease and genomics-based tools and technology. Once again, a companion of supplementary videos offer unique insights into the working heart that enhance the understanding of key points within the text. Comprehensive and state-of-the art, the Handbook of Cardiac Anatomy, Physiology and Devices, Third Edition provides clinicians and biomedical engineers alike with the authoritative information and background they need to work on and implement tomorrow’s generation of life-saving cardiac devices.

Download or read book British Cardiology in the 20th Century written by Mark E. Silverman and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cardiology as a medical specialty originated in the 20th century and Britain played an important role in its development. British Cardiology in the 20th Century provides the first comprehensive account of the British contributions to this exciting field as well as the interesting story of many of the people and institutions who were involved. Many of the key changes in the understanding of the physiology of the heart and their clinical implications were discovered by these individuals. This book will be of great interest to clinicians, students, and medical historians who wish to gain a historical understanding and appreciation of this dynamic clinical discipline that has improved the health and prognosis for so many.

Download or read book PanVascular Medicine written by Peter Lanzer and published by Springer. This book was released on 2015-03-30 with total page 5004 pages. Available in PDF, EPUB and Kindle. Book excerpt: ​Vascular management and care has become a truly multidisciplinary enterprise as the number of specialists involved in the treatment of patients with vascular diseases has steadily increased. While in the past, treatments were delivered by individual specialists, in the twenty-first century a team approach is without doubt the most effective strategy. In order to promote professional excellence in this dynamic and rapidly evolving field, a shared knowledge base and interdisciplinary standards need to be established. Pan Vascular Medicine, 2nd edition has been designed to offer such an interdisciplinary platform, providing vascular specialists with state-of-the art descriptive and procedural knowledge. Basic science, diagnostics, and therapy are all comprehensively covered. In a series of succinct, clearly written chapters, renowned specialists introduce and comment on the current international guidelines and present up-to-date reviews of all aspects of vascular care.

Download or read book 5th International Conference on Biomedical Engineering in Vietnam written by Vo Van Toi and published by Springer. This book was released on 2014-11-18 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the proceedings of the Fifth International Conference on the Development of Biomedical Engineering in Vietnam which was held from June 16-18, 2014 in Ho Chi Minh City. The volume reflects the progress of Biomedical Engineering and discusses problems and solutions. I aims identifying new challenges, and shaping future directions for research in biomedical engineering fields including medical instrumentation, bioinformatics, biomechanics, medical imaging, drug delivery therapy, regenerative medicine and entrepreneurship in medical devices.

Download or read book ABC of Prehospital Emergency Medicine written by Tim Nutbeam and published by John Wiley & Sons. This book was released on 2023-05-15 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the newly revised second edition of ABC of Prehospital Emergency Medicine, a team of experienced prehospital practitioners deliver a comprehensive up-to-date guide to the rapidly evolving field of prehospital emergency medicine. The book includes evidence-based practice and expert opinion to meet the needs of the PHEM training curriculum covering operational, clinical and system considerations. An international team of expert editors and contributors have also provided readers with: A thorough introduction to prehospital emergency medicine, including activation and deployment, personal protective equipment, and scene safety and assessment Comprehensive exploration of the primary survey, airway, breathing, and circulation assessments Practical discussions of prehospital anesthesia, analgesia, sedation, monitoring and ultrasound The prehospital management of medical, trauma and psychiatric emergencies How to care for special groups, including the elderly, obstetric, pediatric, and bariatric patients Considerations in mass casualty and chemical, biological, radiation, and nuclear incidents. ABC of Prehospital Emergency Medicine is essential reading for paramedics, doctors, nurses and other prehospital practitioners. The text is ideal for those undertaking subspecialty PHEM training, those studying for postgraduate prehospital degree modules, or practitioners undertaking PHEM exams.

Download or read book Post Anesthesia Care written by James W. Heitz and published by Cambridge University Press. This book was released on 2016-08-22 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: The initial hours after surgery are a critical time in the care of the surgical patient. Familiarity with the clinical presentation of perioperative complications is important to achieving optimal outcomes. By taking an approach to complications based upon signs and symptoms seen in the early post-operative period among adult patients undergoing non-cardiac surgery, this book aids the practitioner in the clinical management of surgical patients during the often turbulent hours after surgery. After a brief introduction to PACU organization, this manual discusses the common and most serious symptoms encountered in the post-operative patient, giving guidance on diagnosis of the underlying disorder and the treatment options available. The book also includes chapters dedicated to subspecialty patients, including patients requiring post-operative mechanical ventilation, pediatric patients, patients with implantable cardiac devices, morbidly obese patients and the complex pain patient. This practical manual is essential reading for all practitioners working in the PACU environment.

Download or read book Early Vascular Aging EVA written by Pedro Guimarães Cunha and published by Elsevier. This book was released on 2024-02-29 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt: Early Vascular Aging (EVA): New Directions in Cardiovascular Protection, Second Edition continues to be the most comprehensive and authoritative resource on premature alterations in artery structure and function. The book presents a novel approach to the problem of cardiovascular disease, showing it in relation to great vessels disease and revealing a comprehensive approach to the problem of increased rigidity of the great vessels, its causes, and further consequences. This second edition contains completely updated content with expanded coverage of basic and translational research, systematic reviews of the most prominent literature, discussion of applicability of new evidence and more. Written by an international team of clinicians and researchers, this is a valuable resource to basic and translational scientists, clinical researchers and clinicians in the cardiovascular field interested in prevention, diagnosis and treatment of EVA. Contains all the relevant information available on the main paradigm shifts in vascular aging research, from different fields of knowledge (from basic biology to epidemiology) Reviews the most prominent evidence produced on early vascular aging (EVA), highlighting recent research advances, clinical applications, and research opportunities Formulates, in each chapter, a set of research questions that need to be addressed, challenging the vast research community to take on new directions and collaborations