Pub Date : 2002-09-22DOI: 10.1109/CIC.2002.1166856
A. Safer, W. Bystricky, M. Schweizer
ABBIOS software is designed to facilitate extraction of biosignal features for an industrial environment in drug research and development. It is dedicated to handling large amounts of data with a high level of user control. Its purpose is to enable high quality data elaboration for the improvement of drug safety and efficacy, and to ensure improved economic efficacy.
{"title":"ABBIOS (ABbott BIOsignal System): a workbench system software for data mining in biosignals, with applications in drug research and development","authors":"A. Safer, W. Bystricky, M. Schweizer","doi":"10.1109/CIC.2002.1166856","DOIUrl":"https://doi.org/10.1109/CIC.2002.1166856","url":null,"abstract":"ABBIOS software is designed to facilitate extraction of biosignal features for an industrial environment in drug research and development. It is dedicated to handling large amounts of data with a high level of user control. Its purpose is to enable high quality data elaboration for the improvement of drug safety and efficacy, and to ensure improved economic efficacy.","PeriodicalId":80984,"journal":{"name":"Computers in cardiology","volume":"1 1","pages":"649-652"},"PeriodicalIF":0.0,"publicationDate":"2002-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CIC.2002.1166856","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62182263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-09-22DOI: 10.1109/CIC.2002.1166877
M. Malik, M. Gopalakrishnan, R. Malkin
Optical mapping is commonly used to study ventricular fibrillation (VF). Electro-contractile uncouplers like 2,3 Butanedione Monaxime (BDM) are used in these studies to stop the mechanical activity wider the assumption that they do not have an effect on the electrical activity. Our objective is to test this assumption. Male guinea pigs were used in this study. The Animals were anaesthetized and median sternotomy and pericardiectomy were performed to expose the heart An Intracardiac injection of BDM was administered and VF was induced Epicardial unipolar recordings were made for 4s using an electrode array along with a video recording of the heart The procedure was repeated for saline and control. Quantitative analysis of the data was performed using autocorrelation analysis. BDM significantly decreases the mechanical activity of the heart and increased the level of temporal organization during VF.
{"title":"Effect of 2,3 Butanedione Monoxime (BDM) on ventricular fibrillation","authors":"M. Malik, M. Gopalakrishnan, R. Malkin","doi":"10.1109/CIC.2002.1166877","DOIUrl":"https://doi.org/10.1109/CIC.2002.1166877","url":null,"abstract":"Optical mapping is commonly used to study ventricular fibrillation (VF). Electro-contractile uncouplers like 2,3 Butanedione Monaxime (BDM) are used in these studies to stop the mechanical activity wider the assumption that they do not have an effect on the electrical activity. Our objective is to test this assumption. Male guinea pigs were used in this study. The Animals were anaesthetized and median sternotomy and pericardiectomy were performed to expose the heart An Intracardiac injection of BDM was administered and VF was induced Epicardial unipolar recordings were made for 4s using an electrode array along with a video recording of the heart The procedure was repeated for saline and control. Quantitative analysis of the data was performed using autocorrelation analysis. BDM significantly decreases the mechanical activity of the heart and increased the level of temporal organization during VF.","PeriodicalId":80984,"journal":{"name":"Computers in cardiology","volume":"1 1","pages":"733-734"},"PeriodicalIF":0.0,"publicationDate":"2002-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CIC.2002.1166877","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62182308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-09-22DOI: 10.1109/CIC.2002.1166864
T. Srikanth, D. Lin, N. Kanaan, H. Gu
Detection of T wave alternans is constructed as a statistical problem in the present work. The objective was to evaluate the performance of a group of statistical tests in detecting a set of artificially generated alternans episodes and in the European ST (EST) database. Three statistical tests, standard t-test, matched pair t-test, and Rayleigh test, were performed on numerically generated sequences and also on simulated alternans episodes in a rolling sequence of 32 beats. Application of statistical tests to the numerical simulations and beat simulations resulted in 100% detection accuracy. Statistical tests also detected multiple episodes of both visible and invisible alternans in the EST database. Statistical tests seem to provide a complementary and a computationally efficient solution to alternans detection problem in surface ECG.
{"title":"Presence of T wave alternans in the statistical context - a new approach to low amplitude alternans measurement","authors":"T. Srikanth, D. Lin, N. Kanaan, H. Gu","doi":"10.1109/CIC.2002.1166864","DOIUrl":"https://doi.org/10.1109/CIC.2002.1166864","url":null,"abstract":"Detection of T wave alternans is constructed as a statistical problem in the present work. The objective was to evaluate the performance of a group of statistical tests in detecting a set of artificially generated alternans episodes and in the European ST (EST) database. Three statistical tests, standard t-test, matched pair t-test, and Rayleigh test, were performed on numerically generated sequences and also on simulated alternans episodes in a rolling sequence of 32 beats. Application of statistical tests to the numerical simulations and beat simulations resulted in 100% detection accuracy. Statistical tests also detected multiple episodes of both visible and invisible alternans in the EST database. Statistical tests seem to provide a complementary and a computationally efficient solution to alternans detection problem in surface ECG.","PeriodicalId":80984,"journal":{"name":"Computers in cardiology","volume":"1 1","pages":"681-684"},"PeriodicalIF":0.0,"publicationDate":"2002-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CIC.2002.1166864","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62182363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-09-22DOI: 10.1109/CIC.2002.1166865
G. Bortolan, M. Bressan, I. Christov
Serial analysis is performed to evaluate longitudinal modifications of electrocardiographic parameters concerning morphology variations of repolarization phase, using the vectorcardiogram (VCG). The orthogonal Frank leads were synthesized from the standard 12 lead ECG. For this purpose, five parameters were obtained from the VCG with two different methods of considering the zero point. The population based ECG-ILSA database (Italian Longitudinal Study on Aging) was used. All the patients present both in t/sub 1/ and t2=t1+5 years were considered, and those classified as healthy (147), with cardiac diseases (77), with hypertension (219), with angina pectoris (44) and with MI (51) were included in this study. The observed results show a stability T-loop morphology measurements in a temporal interval of 5 years. In addition, the Angina Pectoris group, characterized by a high "clinical instability" showed the most significant longitudinal modifications.
{"title":"Longitudinal modifications of T-loop morphology","authors":"G. Bortolan, M. Bressan, I. Christov","doi":"10.1109/CIC.2002.1166865","DOIUrl":"https://doi.org/10.1109/CIC.2002.1166865","url":null,"abstract":"Serial analysis is performed to evaluate longitudinal modifications of electrocardiographic parameters concerning morphology variations of repolarization phase, using the vectorcardiogram (VCG). The orthogonal Frank leads were synthesized from the standard 12 lead ECG. For this purpose, five parameters were obtained from the VCG with two different methods of considering the zero point. The population based ECG-ILSA database (Italian Longitudinal Study on Aging) was used. All the patients present both in t/sub 1/ and t2=t1+5 years were considered, and those classified as healthy (147), with cardiac diseases (77), with hypertension (219), with angina pectoris (44) and with MI (51) were included in this study. The observed results show a stability T-loop morphology measurements in a temporal interval of 5 years. In addition, the Angina Pectoris group, characterized by a high \"clinical instability\" showed the most significant longitudinal modifications.","PeriodicalId":80984,"journal":{"name":"Computers in cardiology","volume":"1 1","pages":"685-688"},"PeriodicalIF":0.0,"publicationDate":"2002-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CIC.2002.1166865","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62182426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-09-22DOI: 10.1109/CIC.2002.1166708
M. Morales, V. Positano, O. Rodriguez, M. Passera, M. Lombardi, D. Rovai
Contrast agents together with second harmonic imaging improve endocardial border detection in echo images. Aim of the study was to assess whether non linear anisotropic filtering after segmentation of gradient vector flow (GVF) based active contour algorithm can be applied on contrast echo images for automatic detection of left ventricular (LV) contours. LV volumes were measured in 20 subjects by cine Magnetic Resonance (MR) and transthoracic second harmonic echo after intravenous administration of the contrast agent Levovist. Contrast echo images were analyzed both manually and automatically; MR images were automatically analyzed. LV volumes were calculated according to Simpson's rule. A good correlation with MR volumes was found for manual LV volumes (r.93 and .92 for end diastolic and end systolic volumes, respectively, p <.05). A still good correlation was found for the automatically assessed volumes in both phases (r=.90 and .91, p<05). Thus automatic endocardial border delineation by anisotropic filtering and GVF based active contour algorithm is feasible on contrast echo images. This method may represent an approach for automatic endocardial border analysis in ultrasonic imaging.
{"title":"Tracking of the left ventricle in contrast enhanced echocardiography by anisotropic filtering and active contours algorithm","authors":"M. Morales, V. Positano, O. Rodriguez, M. Passera, M. Lombardi, D. Rovai","doi":"10.1109/CIC.2002.1166708","DOIUrl":"https://doi.org/10.1109/CIC.2002.1166708","url":null,"abstract":"Contrast agents together with second harmonic imaging improve endocardial border detection in echo images. Aim of the study was to assess whether non linear anisotropic filtering after segmentation of gradient vector flow (GVF) based active contour algorithm can be applied on contrast echo images for automatic detection of left ventricular (LV) contours. LV volumes were measured in 20 subjects by cine Magnetic Resonance (MR) and transthoracic second harmonic echo after intravenous administration of the contrast agent Levovist. Contrast echo images were analyzed both manually and automatically; MR images were automatically analyzed. LV volumes were calculated according to Simpson's rule. A good correlation with MR volumes was found for manual LV volumes (r.93 and .92 for end diastolic and end systolic volumes, respectively, p <.05). A still good correlation was found for the automatically assessed volumes in both phases (r=.90 and .91, p<05). Thus automatic endocardial border delineation by anisotropic filtering and GVF based active contour algorithm is feasible on contrast echo images. This method may represent an approach for automatic endocardial border analysis in ultrasonic imaging.","PeriodicalId":80984,"journal":{"name":"Computers in cardiology","volume":"1 1","pages":"65-68"},"PeriodicalIF":0.0,"publicationDate":"2002-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CIC.2002.1166708","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62180205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-09-22DOI: 10.1109/CIC.2002.1166761
W. Dassen, E. Gommer, C.C.W. Bonnemayer, H. Spruijt, W. Dijk, M. Baljon
For the management of their disease chronic patients are alternately dependent on the care of the general practitioner, (specialized) nurses or the specialist. For optimally coordinated communication there is a strong need for one single patient record containing all necessary medical information in order to get a complete overview of the condition of the patient for all healthcare providers. In this feasibility study we demonstrated that using current methods for data security and encryption over the Internet an electronic patient record could be employed to be used by only those care providers that have legitimate access to the data. The data security and encryption technology can also be used to employ various other registries not necessary requiring the same level of security.
{"title":"A generic secure Internet-based facility to support multiple registries using modern encryption technology and client certificates","authors":"W. Dassen, E. Gommer, C.C.W. Bonnemayer, H. Spruijt, W. Dijk, M. Baljon","doi":"10.1109/CIC.2002.1166761","DOIUrl":"https://doi.org/10.1109/CIC.2002.1166761","url":null,"abstract":"For the management of their disease chronic patients are alternately dependent on the care of the general practitioner, (specialized) nurses or the specialist. For optimally coordinated communication there is a strong need for one single patient record containing all necessary medical information in order to get a complete overview of the condition of the patient for all healthcare providers. In this feasibility study we demonstrated that using current methods for data security and encryption over the Internet an electronic patient record could be employed to be used by only those care providers that have legitimate access to the data. The data security and encryption technology can also be used to employ various other registries not necessary requiring the same level of security.","PeriodicalId":80984,"journal":{"name":"Computers in cardiology","volume":"1 1","pages":"273-276"},"PeriodicalIF":0.0,"publicationDate":"2002-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CIC.2002.1166761","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62180328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-09-22DOI: 10.1109/CIC.2002.1166765
F. Gouaux, L. Simon-Chautemps, J. Fayn, S. Adami, M. Arzi, D. Assanelli, M. Forlini, C. Malossi, A. Martínez, J. Placide, G.L. Ziliani, P. Rubel
In western countries, heart disease is the main cause of premature death. Most of cardiac deaths occur out of hospital. Symptoms are often interpreted incorrectly. Victims do not survive long enough to benefit from in-hospital treatments. To reduce the time before treatment, the only useful diagnostic tool to assess the presence of a cardiac event is the electrocardiogram (ECG). Event and transtelephonic ECG recorders are used to improve decision-making but require setting up new infrastructures. The Pervasive solution proposed by the European EPI-MEDICS project is an intelligent Personal ECG Monitor for the early detection of cardiac events. It includes decision-making techniques, generates different alarm levels and forwards alarm messages to the relevant care providers by means of new generation wireless communication. It is cost saving, involving care provider only if necessary without specific infrastructure. Healthcare becomes personalized, wearable, ubiquitous.
{"title":"Ambient intelligence and pervasive systems for the monitoring of citizens at cardiac risk: New solutions from the EPI-MEDICS project","authors":"F. Gouaux, L. Simon-Chautemps, J. Fayn, S. Adami, M. Arzi, D. Assanelli, M. Forlini, C. Malossi, A. Martínez, J. Placide, G.L. Ziliani, P. Rubel","doi":"10.1109/CIC.2002.1166765","DOIUrl":"https://doi.org/10.1109/CIC.2002.1166765","url":null,"abstract":"In western countries, heart disease is the main cause of premature death. Most of cardiac deaths occur out of hospital. Symptoms are often interpreted incorrectly. Victims do not survive long enough to benefit from in-hospital treatments. To reduce the time before treatment, the only useful diagnostic tool to assess the presence of a cardiac event is the electrocardiogram (ECG). Event and transtelephonic ECG recorders are used to improve decision-making but require setting up new infrastructures. The Pervasive solution proposed by the European EPI-MEDICS project is an intelligent Personal ECG Monitor for the early detection of cardiac events. It includes decision-making techniques, generates different alarm levels and forwards alarm messages to the relevant care providers by means of new generation wireless communication. It is cost saving, involving care provider only if necessary without specific infrastructure. Healthcare becomes personalized, wearable, ubiquitous.","PeriodicalId":80984,"journal":{"name":"Computers in cardiology","volume":"1 1","pages":"289-292"},"PeriodicalIF":0.0,"publicationDate":"2002-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CIC.2002.1166765","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62180496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-09-22DOI: 10.1109/CIC.2002.1166736
L. Legrand, C. Bordier, A. Lalande, P. Walker, F. Brunotte, C. Quantin
The work presented here relates to a method for motion tracking in sequences of medical images. The purpose is to quantify the general motions and the local deformations of a beating heart during a cardiac cycle. In order to achieve this goal, we first tessellate the first image of the sequence into triangular patches. A Delaunay triangulation is applied to find the optimal set of triangles describing this image, giving a mesh covering the organs. One imposes the contours of the organs to correspond to edges of triangles so that each part of the heart (left ventricle, right ventricle, myocardium) can he described as a different set of triangles, each set indicated by a different color. We then track the nodes of the mesh on the image sequence while imposing them to remain on the edges of the different parts of the heart.
{"title":"Magnetic resonance image segmentation and heart motion tracking with an active mesh based system","authors":"L. Legrand, C. Bordier, A. Lalande, P. Walker, F. Brunotte, C. Quantin","doi":"10.1109/CIC.2002.1166736","DOIUrl":"https://doi.org/10.1109/CIC.2002.1166736","url":null,"abstract":"The work presented here relates to a method for motion tracking in sequences of medical images. The purpose is to quantify the general motions and the local deformations of a beating heart during a cardiac cycle. In order to achieve this goal, we first tessellate the first image of the sequence into triangular patches. A Delaunay triangulation is applied to find the optimal set of triangles describing this image, giving a mesh covering the organs. One imposes the contours of the organs to correspond to edges of triangles so that each part of the heart (left ventricle, right ventricle, myocardium) can he described as a different set of triangles, each set indicated by a different color. We then track the nodes of the mesh on the image sequence while imposing them to remain on the edges of the different parts of the heart.","PeriodicalId":80984,"journal":{"name":"Computers in cardiology","volume":"1 1","pages":"177-180"},"PeriodicalIF":0.0,"publicationDate":"2002-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CIC.2002.1166736","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62180527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-09-22DOI: 10.1109/CIC.2002.1166739
O. Blagosklonov, L. Comas, R. Sabbah, J. Verdenet, M. Baud, J. Cardot
This paper presents a method of wavelet application for the denoising of gated blood pool image series. Our method is based on the transformation of image series into periodical 1D signal followed by the application of 1D wavelets. We used visual analysis of resulting images, Fourier analysis, analysis of gradient images and analysis of time-activity curves to compare the performances of the method presented and the "classical" image-by-image 2D wavelet spatial smoothing. Our results showed that the series smoothing by ID wavelets may be a good alternative to 2D wavelet smoothing and may offer more accurate image denoising. We suggest that after validation on a statistically sufficient number of patients, the method presented can be easily introduced and used in routine nuclear cardiology practice.
{"title":"Using wavelets for smoothing and denoising gated blood pool images","authors":"O. Blagosklonov, L. Comas, R. Sabbah, J. Verdenet, M. Baud, J. Cardot","doi":"10.1109/CIC.2002.1166739","DOIUrl":"https://doi.org/10.1109/CIC.2002.1166739","url":null,"abstract":"This paper presents a method of wavelet application for the denoising of gated blood pool image series. Our method is based on the transformation of image series into periodical 1D signal followed by the application of 1D wavelets. We used visual analysis of resulting images, Fourier analysis, analysis of gradient images and analysis of time-activity curves to compare the performances of the method presented and the \"classical\" image-by-image 2D wavelet spatial smoothing. Our results showed that the series smoothing by ID wavelets may be a good alternative to 2D wavelet smoothing and may offer more accurate image denoising. We suggest that after validation on a statistically sufficient number of patients, the method presented can be easily introduced and used in routine nuclear cardiology practice.","PeriodicalId":80984,"journal":{"name":"Computers in cardiology","volume":"1 1","pages":"189-192"},"PeriodicalIF":0.0,"publicationDate":"2002-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CIC.2002.1166739","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62180599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-09-22DOI: 10.1109/CIC.2002.1166757
J.B. Pormann, J.A. Board, D. Rose, C. Henriquez
Simulation of wavefront propagation in the whole heart requires significant computational resources. The growth of cluster computing has made it possible to simulate very large scale problems in a lab environment. In this work, we present computational results of simulating a reaction diffusion system of equations of various sizes on a Beowulf cluster. To facilitate comparisons at different spatial resolutions, an idealized ventricular geometry was used. The model incorporates anisotropy, fiber rotation, and realistic membrane dynamics to determine the computational constraints for the most detailed situations of interest. Three meshes with mesh spacings of 378/spl mu/m, 238/spl mu/m, and 150/spl mu/m, corresponding to roughly 1M, 4M, and 16M nodes in the computational domain, were considered. The results show that good parallel performance is possible on a cluster up to 32 processors.
{"title":"Large-scale modeling of cardiac electrophysiology","authors":"J.B. Pormann, J.A. Board, D. Rose, C. Henriquez","doi":"10.1109/CIC.2002.1166757","DOIUrl":"https://doi.org/10.1109/CIC.2002.1166757","url":null,"abstract":"Simulation of wavefront propagation in the whole heart requires significant computational resources. The growth of cluster computing has made it possible to simulate very large scale problems in a lab environment. In this work, we present computational results of simulating a reaction diffusion system of equations of various sizes on a Beowulf cluster. To facilitate comparisons at different spatial resolutions, an idealized ventricular geometry was used. The model incorporates anisotropy, fiber rotation, and realistic membrane dynamics to determine the computational constraints for the most detailed situations of interest. Three meshes with mesh spacings of 378/spl mu/m, 238/spl mu/m, and 150/spl mu/m, corresponding to roughly 1M, 4M, and 16M nodes in the computational domain, were considered. The results show that good parallel performance is possible on a cluster up to 32 processors.","PeriodicalId":80984,"journal":{"name":"Computers in cardiology","volume":"1 1","pages":"259-262"},"PeriodicalIF":0.0,"publicationDate":"2002-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/CIC.2002.1166757","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62180761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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