472 resources related to Cardiac tissue
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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 IEEE 17th International Symposium on Biomedical Imaging (ISBI 2020)
The IEEE International Symposium on Biomedical Imaging (ISBI) is the premier forum for the presentation of technological advances in theoretical and applied biomedical imaging. ISBI 2020 will be the 17th meeting in this series. The previous meetings have played a leading role in facilitating interaction between researchers in medical and biological imaging. The 2020 meeting will continue this tradition of fostering cross-fertilization among different imaging communities and contributing to an integrative approach to biomedical imaging across all scales of observation.
2020 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
CVPR is the premier annual computer vision event comprising the main conference and several co-located workshops and short courses. With its high quality and low cost, it provides an exceptional value for students, academics and industry researchers.
The International Conference on Image Processing (ICIP), sponsored by the IEEE SignalProcessing Society, is the premier forum for the presentation of technological advances andresearch results in the fields of theoretical, experimental, and applied image and videoprocessing. ICIP 2020, the 27th in the series that has been held annually since 1994, bringstogether leading engineers and scientists in image and video processing from around the world.
The International Conference on Robotics and Automation (ICRA) is the IEEE Robotics and Automation Society’s biggest conference and one of the leading international forums for robotics researchers to present their work.
The Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems ...
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.
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.
Part I will now contain regular papers focusing on all matters related to fundamental theory, applications, analog and digital signal processing. Part II will report on the latest significant results across all of these topic areas.
Physics, medicine, astronomy—these and other hard sciences share a common need for efficient algorithms, system software, and computer architecture to address large computational problems. And yet, useful advances in computational techniques that could benefit many researchers are rarely shared. To meet that need, Computing in Science & Engineering (CiSE) presents scientific and computational contributions in a clear and accessible format. ...
IEEE Ultrasonics Symposium, 2004, 2004
Ultrasound tissue Doppler imaging (TDI) can be used to measure velocities of moving cardiac tissue during the cardiac cycle. Aortic valve closure (AVC) can be seen as a notch occurring after ejection, but before early relaxation in velocity/time curves from apical TDI images of the base of the left ventricle. The timing of AVC may be determined by manually looking ...
2007 Joint Meeting of the 6th International Symposium on Noninvasive Functional Source Imaging of the Brain and Heart and the International Conference on Functional Biomedical Imaging, 2007
Recent findings indicate that stable organized centers of rapid activity (mother rotors) can maintain ventricular fibrillation (VF). Two computer models (one with a simplified cubic geometry and a morphologically correct one) were developed for understanding how this organized intracardiac cellular activity is reflected on the body surface during VF. Both models contained a driving region of fast periodic activity in ...
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011
A tissue bath system, to be used as an alternative to complex perfusion chambers, was constructed for use in cardiac electrophysiological studies. This system consists of an acrylic chamber to hold circulating physiological medium such as DMEM, suspended in a water bath warmed by a hot plate. Temperature and pH were controlled to mimic physiological conditions. Rat and porcine cardiac ...
The 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2004
In this paper we present a multi-scale approach for cardiac modeling. Based on the histology of cardiac tissue we created a geometrical model at a cellular scale to compute the effective conductivity of a piece of cardiac tissue. In turn, the conductivity values obtained from this cellular scale model were used in a whole heart model in which we simulated ...
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991, 1991
IEEE Sections Congress 2014: Luc Van den Hove, Wearable Medical Technology
Pierre DuPont-Life Sciences
Virtual World Symposium 2011 - Collaborative Work
Oral History: Earl Bakken
ISEC 2013 Special Gordon Donaldson Session: Remembering Gordon Donaldson - 5 of 7 - SQUID Instrumentation for Early Cancer Diagnostics
ISEC 2013 Special Gordon Donaldson Session: Remembering Gordon Donaldson - 4 of 7 - MRI at 130 Microtesla
IEEE Life Sciences - Joseph M. Smith Interview
Contactless Wireless Sensing - Shyam Gollakota - IEEE EMBS at NIH, 2019
ASC-2014 SQUIDs 50th Anniversary: 2 of 6 - John Clarke - The Ubiquitous SQUID
IEEE Magnetics 2014 Distinguished Lectures - Tim St Pierre
Ultrasound tissue Doppler imaging (TDI) can be used to measure velocities of moving cardiac tissue during the cardiac cycle. Aortic valve closure (AVC) can be seen as a notch occurring after ejection, but before early relaxation in velocity/time curves from apical TDI images of the base of the left ventricle. The timing of AVC may be determined by manually looking for this event. An automated algorithm first detecting the timing of early relaxation and mitral valve opening, is however also able to determine the timing of AVC by searching in both space and time. The automated algorithm was tested on the apical four-chamber, two-chamber and long axis views of 16 healthy subjects. In 88% of the cine-loops the algorithm estimated the timing of AVC within 20 msec off the start of the second heart sound as visible in simultaneously recorded calibrated phonocardiograms. Automated detection of AVC might save manual effort, and provide a marker separating ejection and diastole for further automated analysis.
Recent findings indicate that stable organized centers of rapid activity (mother rotors) can maintain ventricular fibrillation (VF). Two computer models (one with a simplified cubic geometry and a morphologically correct one) were developed for understanding how this organized intracardiac cellular activity is reflected on the body surface during VF. Both models contained a driving region of fast periodic activity in the cardiac tissue. Comparing the dominant frequency maps of the body surface and the epicardium a spatial- temporal low pass filtering can be recognized. Whereas on the myocardium the organized region occurred from the mother rotor and a chaotic fibrillatory conduction in the rest of the cardiac tissue can be measured, no organized pattern was observable on the body surface and the DF was reduced in both models. It was shown that wave propagation transforms the spatial low pass filtering of the thorax into a temporal low pass in the far field. It hampers the observation of cardiac organization from the body surface. Note that no RC low pass structure was included in the models.
A tissue bath system, to be used as an alternative to complex perfusion chambers, was constructed for use in cardiac electrophysiological studies. This system consists of an acrylic chamber to hold circulating physiological medium such as DMEM, suspended in a water bath warmed by a hot plate. Temperature and pH were controlled to mimic physiological conditions. Rat and porcine cardiac tissues, were used to test viability of the conditions presented in the bath system. Using a cardiac mapping system, the tissues were stimulated and responses recorded. From the recordings we were able to calculate conduction velocities and spatial dispersion of activation indices. The results are comparable to previous in-vivo work, which suggests that the tissue bath system design can maintain tissue viability. This tissue bath system is a relatively simple alternative for ex-vivo testing of cardiac tissues.
In this paper we present a multi-scale approach for cardiac modeling. Based on the histology of cardiac tissue we created a geometrical model at a cellular scale to compute the effective conductivity of a piece of cardiac tissue. In turn, the conductivity values obtained from this cellular scale model were used in a whole heart model in which we simulated regional, subendocardial ischemia. Histological changes at a cellular level led to changes in the effective conductivity tensor of the tissue, which in turn resulted in changes in the epicardial potential patterns during the ST-interval. Two effects were studied using this multi-scale approach: (1) the influence of a dynamically growing ischemic region on the epicardial potentials, and (2) the influence of a dynamically changing conductivity in the ischemic zone due to changes in the underlying pathology. One specific finding was the presence of epicardial patterns consisting of a central elevation and two opposite depressions at the edges of the ischemic zone which rotated as the ischemia became more transmural. In addition, the epicardial potentials decreased in magnitude with the duration of the ischemia due to changes in the effective conductivity of the ischemic tissue predicted by the cellular level model.
Spiral wave tips rotate either around a circular core or meander, inscribing a non-circular pattern. The transition to meandering was found to be equivalent to the transition from wave tip separation to wave tip attachment around the end of an unexcitable strip of thickness comparable to the wavefront thickness. The medium properties defining the transition from circular to non- circular spiral tip movement is accurately predicted by the balance of the diffusive fluxes in the vicinity of the wave tip within the boundary layer of the order of the wavefront thickness. Small changes in the boundary layer charge can dramatically alter spiral tip motion and provide a new tool for control and classification of cardiac arrhythmias.
This paper studies the ECG signal prior to a transient ST change. Two hypotheses are proposed. The first is that various types of ST changes can be differentiated using the signal just prior to the ST event. The second is that ischemic ST changes can be differentiated from non-events, again using the signal prior to the ST event. A machine learning approach, based on Gaussian mixture models and maximum likelihood Bayesian classification, is used to analyze the ECG signal. Two sets of feature extraction techniques, reconstructed phase space and Karhunen Loeve transform, are applied, both of which capture morphological characteristics of the ECG signal. The results in addressing the first hypothesis show that information indicative of the type of ST change is present in the signal prior to the onset of the ST event; however the classification accuracy is low. The second hypothesis cannot be affirmed with the results presented here
The national organ transplant waiting list is growing five times faster than the rate of organ donation, indicating a need to provide a more plentiful source of tissue replacements. Furthermore, the national number one cause for human death is heart disease. Because of the high percentage of heart failure and a low number of successful organ donations, studies are now focusing on the design of new generation biomaterials and functional tissue constructs for specialized tissue repair and replacement. Developing such biomaterials requires the fabrication of scaffolds that mimic in vivo extracellular matrices (ECM). The objective of this study was to design a 'smart' biomaterial that mimics conditions in vivo, creating a micro-and nano- environment suitable for healthy cardiac tissue growth and function.
Introduction - The TASER®conducted electrical weapon (CEW) delivers electrical pulses that can temporarily incapacitate subjects. We analyzed the distribution of TASER CEW currents in tissues posterior to the sternum to understand the likelihood of triggering cardiac arrhythmias. We also assessed the electrical `shielding' effects of the sternum. Methods and Results - Finite element modeling (FEM) was used to approximate the current density and electric field strength in tissues around the sternum. We analyzed 2 CEW dart deployment scenarios: (a) both darts over the anterior aspect of the sternum; and (b) a CEW dart anterior to the sternum and the other over the abdomen. In both scenarios, the sternum provided significant attenuation of CEW currents. Particularly, both FEMs predicted that the residual electrical current or charge from CEWs would be insufficient to cause either cardiac capture or induction of ventricular fibrillation at locations where cardiac tissue would reside relative to the posterior aspect of the sternum. Conclusion - The sternum offers significant `shielding' effect and protects the tissues posterior to it against effects of electrical current flow from anteriorly- placed CEW electrodes.
No standards are currently tagged "Cardiac tissue"