Characterization Of Cardiac Electrogram Signals During Atrial Fibrillation
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Characterization Of Cardiac Electrogram Signals During Atrial Fibrillation
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Author : Prasanth Ganesan
language : en
Publisher:
Release Date : 2015
Characterization Of Cardiac Electrogram Signals During Atrial Fibrillation written by Prasanth Ganesan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Atrial fibrillation categories.
"Atrial fibrillation (AF) is the most common cardiac arrhythmia in United States. The most popular treatment for AF is a percutaneous procedure called catheter ablation. Current AF ablation procedures unfortunately have a poor success rate, primarily because the mechanisms involved in AF are incompletely understood even today. Intra-atrial electrograms have previously been shown to provide information on the mechanisms of AF. This thesis focuses on two such mechanisms -- AF-sustaining sites known as sustained rotational activities (RotAs), and atrial tissue with unique electrical properties known as myocardial scars. Catheter ablation procedures today construct the 3D electroanatomic map of the left atrium (LA) by maneuvering a conventional Multipolar Diagnostic Catheter (MPDC) along the LA endocardial surface. These procedures are limited to pulmonary vein isolation and other linear ablation performed on various regions of the left atrium (such as roof and mitral isthmus) where the regions are decided based on the atrial anatomy. However, it remains unclear how to utilize the information provided by the MPDC to analyze and characterize the RotAs and scars. Previous electrogram characterization studies mainly use a single bipole rather than MPDCs to characterize the electrograms based on features such as cycle length or dominant frequency from the time or frequency domain. In this thesis we developed novel techniques for investigating the above mentioned mechanisms using signal analysis, mathematical modeling, numerical simulation and clinical experiments, all utilizing MPDC recordings. First, the variations in the total conduction delay (TCD) from MPDC electrograms as the MPDC moves towards a RotA source was investigated. Second, the maximum peak-to-peak amplitudes of MPDC electrograms recorded during AF and NSR were analyzed. This thesis provides insights into methods of characterization of cardiac electrograms and the findings of this thesis could address the current challenges in AF ablation."--Abstract.
Interpreting Cardiac Electrograms
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Author : Kevin Michael
language : en
Publisher: BoD – Books on Demand
Release Date : 2017-10-18
Interpreting Cardiac Electrograms written by Kevin Michael and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-18 with Medical categories.
This is a reference book aimed at cardiologists, electrophysiologists and fellows in training. It presents an expansive review of cardiac electrogram interpretation in a collation of manuscripts that represent clinical studies, relevant anecdotal cases and basic science chapters evaluating cardiac signal processing pertaining to persistent atrial fibrillation. A diagnostic approach to arrhythmias using a standard ECG, the signal average ECG and fetal ECG is highlighted. Intracardiac ICD electrograms are also explored in terms of trouble shooting and device programming.
Atrial Fibrillation From An Engineering Perspective
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Author : Leif Sörnmo
language : en
Publisher: Springer
Release Date : 2018-05-15
Atrial Fibrillation From An Engineering Perspective written by Leif Sörnmo and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-15 with Technology & Engineering categories.
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.
Understanding Atrial Fibrillation The Signal Processing Contribution
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Author : Luca Mainardi
language : en
Publisher: Morgan & Claypool Publishers
Release Date : 2008
Understanding Atrial Fibrillation The Signal Processing Contribution written by Luca Mainardi and has been published by Morgan & Claypool Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Arrhythmia categories.
The book presents recent advances in signal processing techniques for modeling, analysis, and understanding of the heart's electrical activity during atrial fibrillation. This arrhythmia is the most commonly encountered in clinical practice and its complex and metamorphic nature represents a challenging problem for clinicians, engineers, and scientists. Research on atrial fibrillation has stimulated the development of a wide range of signal processing tools to better understand the mechanisms ruling its initiation, maintenance, and termination. This book provides undergraduate and graduate students, as well as researchers and practicing engineers, with an overview of techniques, including time domain techniques for atrial wave extraction, time-frequency analysis for exploring wave dynamics, and nonlinear techniques to characterize the ventricular response and the organization of atrial activity. The book includes an introductory chapter about atrial fibrillation and its mechanisms, treatment, and management. The successive chapters are dedicated to the analysis of atrial signals recorded on the body surface and to the quantification of ventricular response. The rest of the book explores techniques to characterize endo- and epicardial recordings and to model atrial conduction. Under the appearance of being a monothematic book on atrial fibrillation, the reader will not only recognize common problems of biomedical signal processing but also discover that analysis of atrial fibrillation is a unique challenge for developing and testing novel signal processing tools.
Analysis Of Atrial Electrograms
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Author : Christopher Schilling
language : en
Publisher: KIT Scientific Publishing
Release Date : 2012
Analysis Of Atrial Electrograms written by Christopher Schilling and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Atrial fibrillation categories.
This work provides methods to measure and analyze features of atrial electrograms - especially complex fractionated atrial electrograms (CFAEs) - mathematically. Automated classification of CFAEs into clinical meaningful classes is applied and the newly gained electrogram information is visualized on patient specific 3D models of the atria. Clinical applications of the presented methods showed that quantitative measures of CFAEs reveal beneficial information about the underlying arrhythmia.
Practical Signal And Image Processing In Clinical Cardiology
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Author : Jeffrey J Goldberger
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-07-28
Practical Signal And Image Processing In Clinical Cardiology written by Jeffrey J Goldberger and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-07-28 with Medical categories.
Modern signal and image acquisition systems used in the field of cardiology acquire, analyze, and store data digitally. Surface electrocardiography, intra-cardiac electrogram recording, echocardiograms, x-ray, magnetic resonance imaging, and computed tomography are among the modalities in the cardiology field where signal processing is applied. Digital signal processing techniques allow us to automate many of the analyses that had previously been done manually with greater precision, accuracy and speed, as well as detect features and patterns in data that may be too subtle to observe by eye. As more cardiologists are becoming more reliant on such technology, a basic understanding of digital signals and the techniques used to extract information from these signals are required.
Functional Characterization Of Atrial Electrograms In Sinus Rhythm Delineates Sites Of Parasympathetic Innervation In Patients With Paroxysmal Atrial Fibrillation
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Author : Eric F. Buch
language : en
Publisher:
Release Date : 2009
Functional Characterization Of Atrial Electrograms In Sinus Rhythm Delineates Sites Of Parasympathetic Innervation In Patients With Paroxysmal Atrial Fibrillation written by Eric F. Buch and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
A Signal Modeling Method For Analysis Of Cardiac Arrhythmias In Intraventricular Electrograms
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Author : Cynthia Jean Finelli
language : en
Publisher:
Release Date : 1993
A Signal Modeling Method For Analysis Of Cardiac Arrhythmias In Intraventricular Electrograms written by Cynthia Jean Finelli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Spectral Analysis Of Atrial Fibrillation Electrograms
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Author : Shruti Sharma
language : en
Publisher:
Release Date : 2010
Spectral Analysis Of Atrial Fibrillation Electrograms written by Shruti Sharma and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
VWA has not yet been tested on real fragmented signals due to the inability to detect a ground truth to calculate error. Nevertheless, there is considerable challenge in the analysis of simulated electrogram signals. It improves the correlation coefficient between the ground truth and the frequencies calculated using the current state of the art and the VWA from 0.069 to 0.91 proving to be a more reliable and accurate in capturing the changing frequency of the signal than methods currently used.
Time Frequency Characterization Of Atrial Arrhythmias Using Principal Decomposition
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Author :
language : en
Publisher:
Release Date : 2001
Time Frequency Characterization Of Atrial Arrhythmias Using Principal Decomposition written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
A new noninvasive technique for atrial arrhythmia analysis is presented which, based on time frequency analysis and principal decomposition produces trends of the atrial signal characteristics using the surface ECG. New homogeneity measures are introduced in order to continuously measure how well the decomposed functions represent the atrial signals. A database containing signals from 20 patients with different atrial arrhythmias (mainly atrial fibrillation) was analyzed. It was found that the method is very well-suited for characterizing the signals and it is expected that the resulting functions may be useful for separating different arrhythmias.