Defibrillation

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Defibrillation is a common treatment for life-threatening cardiac arrhythmias, ventricular fibrillation and pulseless ventricular tachycardia. (Wikipedia.org)






Conferences related to Defibrillation

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2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)

The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted papers will be peer reviewed. Accepted high quality papers will be presented in oral and postersessions, will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE


2020 59th IEEE Conference on Decision and Control (CDC)

The CDC is the premier conference dedicated to the advancement of the theory and practice of systems and control. The CDC annually brings together an international community of researchers and practitioners in the field of automatic control to discuss new research results, perspectives on future developments, and innovative applications relevant to decision making, automatic control, and related areas.


2019 IEEE 32nd International Symposium on Computer-Based Medical Systems (CBMS)

CBMS 2019 will provide an international forum to discuss the latest developments in the field of computational medicine, biomedical informatics and related fields. During the CBMS symposium, there will be regular and special track (ST) sessions with technical contributions reviewed and selected by an international programme committee, as well as keynote talks and tutorials given by leading experts in their fields. Regular and ST presentations will cover a broad range of issues in related to areas in the context of medical informatics, e-Health, computer vision, healthcare games, software systems in medicine, big data analytics in healthcare, cognitive computing in healthcare, telemedicine systems, medical education, HCI in healthcare, web-based medical information, active and healthy aging systems, technology in clinical and healthcare research, among others.


2018 14th International Conference on Advanced Trends in Radioelecrtronics, Telecommunications and Computer Engineering (TCSET)

The main purpose of the conference is presentation of the novel results in science andtechnology and the exchange ideas in the area of Radioelectronics, Telecommunications and Computer Engineering


2018 18th Biennial Conference on Electromagnetic Field Computation (CEFC)

The aims of the IEEE CEFC are to present the latest developments in modeling and simulation methodologies for the analysis of electromagnetic fields and wave interactions, with the application emphasis being on the computer-aided design of low and high frequency devices, components and systems. Scientists and engineers worldwide are invited to submit original contributions in the areas of Static and Quasi-static Fields, Wave Propagation, Material Modeling, Coupled Problems, Numerical Techniques, Optimization and Design, Software Methodology, Nanomagnetics, Nanophotonics, Bioelectric Field Computation as well as Devices and Applications.


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Periodicals related to Defibrillation

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Biomedical Engineering, IEEE Reviews in

The IEEE Reviews in Biomedical Engineering will review the state-of-the-art and trends in the emerging field of biomedical engineering. This includes scholarly works, ranging from historic and modern development in biomedical engineering to the life sciences and medicine enabled by technologies covered by the various IEEE societies.


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


Broadcasting, IEEE Transactions on

Broadcast technology, including devices, equipment, techniques, and systems related to broadcast technology, including the production, distribution, transmission, and propagation aspects.


Engineering in Medicine and Biology Magazine, IEEE

Both general and technical articles on current technologies and methods used in biomedical and clinical engineering; societal implications of medical technologies; current news items; book reviews; patent descriptions; and correspondence. Special interest departments, students, law, clinical engineering, ethics, new products, society news, historical features and government.


Information Technology in Biomedicine, IEEE Transactions on

Telemedicine, teleradiology, telepathology, telemonitoring, telediagnostics, 3D animations in health care, health information networks, clinical information systems, virtual reality applications in medicine, broadband technologies, and global information infrastructure design for health care.


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Xplore Articles related to Defibrillation

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Correction

IRE Transactions on Medical Electronics, 1956

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A system for in-vivo cardiac defibrillation current density imaging in a pig

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439), 2003

Current density imaging (CDI), based on magnetic resonance imaging (MRI), has been used in past studies to measure electrical current pathways associated with external defibrillation electrodes placed on a post-mortem pig. We are preparing to make the same measurements in a living pig. This abstract describes a fast low frequency CDI (FLFCDI) cardiac sequence for this purpose. This sequence is ...


DefibSim: an interactive defibrillation device design tool

Proceedings of 17th International Conference of the Engineering in Medicine and Biology Society, 1995

We have developed an interactive computer modeling tool (DefibSim) for defibrillation device design. This system allows researchers to interactively design and place electrodes within a large-scale thorax model and then compute the electric and potential fields using an adaptive finite element method. Both visual and quantitative measures have been developed to determine the efficacy of different electrode configurations. This tool ...


Effects of spatio-temporal conduction anisotropy on critical interval and coherence

Proceedings of the First Joint BMES/EMBS Conference. 1999 IEEE Engineering in Medicine and Biology 21st Annual Conference and the 1999 Annual Fall Meeting of the Biomedical Engineering Society (Cat. N, 1999

The authors hypothesized that spatio-temporal anisotropy may lead to changes in critical interval and time-coherence that are observed experimentally. To test their hypothesis they performed numerical simulations. Using an S1-S2 protocol rotors were induced in the left and right half of a 128/spl times/128 matrix of cells using a Fitzhugh-Nagumo model. Midway through the simulations pseudo potassium conductance (gk) was ...


Ventricular fibrillation detection in ventricular fibrillation signals corrupted by cardiopulmonary resuscitation artifact

Computers in Cardiology, 2003, 2003

This study is focused on the removal of artifacts due to cardiopulmonary resuscitation (CPR) on ventricular fibrillation ECG signals. The aim is to allow a reliable analysis of the cardiac rhythm by an AED or the defibrillation success analysis during CPR episodes. The research is based on a human model for the CPR artifact and the VF ECG signals. The ...


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  • A system for in-vivo cardiac defibrillation current density imaging in a pig

    Current density imaging (CDI), based on magnetic resonance imaging (MRI), has been used in past studies to measure electrical current pathways associated with external defibrillation electrodes placed on a post-mortem pig. We are preparing to make the same measurements in a living pig. This abstract describes a fast low frequency CDI (FLFCDI) cardiac sequence for this purpose. This sequence is based on a commercial fast gradient recalled echo (FGRE) MRI sequence with cardiac triggering. This sequence can produce phase images of the heart of sufficient quality to be used for CDI. A CDI system appropriate for a living animal is described and solutions are proposed for all of the artifacts and design issues. The CDI system can apply current pulses of 150 mA zero-to-peak amplitude and 5 ms duration. Phantom images, measurements of electrode impedance, and CDI signal-to-noise ratio (SNR) for this sequence are presented.

  • DefibSim: an interactive defibrillation device design tool

    We have developed an interactive computer modeling tool (DefibSim) for defibrillation device design. This system allows researchers to interactively design and place electrodes within a large-scale thorax model and then compute the electric and potential fields using an adaptive finite element method. Both visual and quantitative measures have been developed to determine the efficacy of different electrode configurations. This tool has allowed us to quickly and efficiently investigate over 170 different electrode configurations. A promising subset of electrode locations are now being tested in animals as well as in clinical environments.

  • Effects of spatio-temporal conduction anisotropy on critical interval and coherence

    The authors hypothesized that spatio-temporal anisotropy may lead to changes in critical interval and time-coherence that are observed experimentally. To test their hypothesis they performed numerical simulations. Using an S1-S2 protocol rotors were induced in the left and right half of a 128/spl times/128 matrix of cells using a Fitzhugh-Nagumo model. Midway through the simulations pseudo potassium conductance (gk) was changed in one half of the matrix. This caused the two rotors to become asynchronous in rotational velocity. The authors observed that the average coherence was high when the rotors were synchronous and it was low when the rotors became asynchronous. For different combinations of gk and pseudo-sodium conductance (gNa) they observed a pronounced change in the critical interval.

  • Ventricular fibrillation detection in ventricular fibrillation signals corrupted by cardiopulmonary resuscitation artifact

    This study is focused on the removal of artifacts due to cardiopulmonary resuscitation (CPR) on ventricular fibrillation ECG signals. The aim is to allow a reliable analysis of the cardiac rhythm by an AED or the defibrillation success analysis during CPR episodes. The research is based on a human model for the CPR artifact and the VF ECG signals. The test signals were generated adding the CPR artifact (noise) to the VF (signal), with a known signal-to-noise Ratio (SNR). The results of the adaptive Kalman filtering have been obtained according to three different levels: SNR improvement; sensitivity improvement in the AED algorithm for the detection of shockable rhythm; and variations of the significant frequencies, compared to the values obtained with the original VF signals. In all cases, remarkable results have been achieved regarding to the efficiency in the artifact removal.

  • Measurement of cardiac electric field and current density during defibrillation

    To better delineate the mechanisms for defibrillation, work has begun to integrate experimental and numerical analyses of the electric field and current density during defibrillation. Measurement techniques developed are described. A bipolar electrode that eliminates the measurement errors associated with conventional unipolar electrodes is presented. Measurement results are presented together with a finite-element field solver that is useful for the numerical analysis of defibrillation and prediction of field perturbation associated with the bipolar electrodes.<<ETX>>

  • Electrical Injury To Heart Muscle: The Role Of Electroporation

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  • Defibrillation thresholds in a three-dimensional computer model

    An algorithm is developed to simulate defibrillation (DF)-level electric shocks on a 3D computer model. HeartSim, of the the heart ventricles. These defibrillation-level shocks are based on current density distributions calculated from finite element simulations. Successful DF shocks produce a long period of inactivation (>200 ms) when almost no activation occurs in the heart. In contrast, unsuccessful pulses produce a short period (ave.=53.8 ms) of low activation after which reentrant loops are initiated by the nondepolarized cells. As a result of single pulse DF simulations on HeartSim, it is found that the success of a DF shock is dependent on the number of elements excited by the shock, the relative positions of these elements at the time of the shock, and the extension of the refractory period of the elements. In addition to single DF pulses, two square pulses are simulated, each half the duration of a single pulse, and separated by a 65 ms interval. This results in a 68% reduction in DF threshold energy from that required by a single DF pulse.<<ETX>>

  • General superiority of biphasic over uniphasic shocks in cardiac defibrillation

    The comparative results of eight studies involving uniphasic and biphasic waveforms in 16383 transthoracic fibrillation-defibrillation episodes in 100-kg calves are critically summarized. A 1200-episode study of uniphasic and biphasic waveforms in epicardial and catheter defibrillation in dogs and two studies involving 733 defibrillation attempts using uniphasic and biphasic waveforms in the epicardial defibrillation of calves are presented. It is found that appropriate biphasic waveforms generally outperform uniphasic waveforms by (a) yielding a higher percent success, (b) requiring less energy to yield the peak possible value of success, and (c) furnishing quite successful results over a broader range of waveform parameters, thus making satisfactory performance less dependent on operator technique or patient-to- patient differences.<<ETX>>

  • Electric Current Pathways In The Human Thorax

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