R. Hoekema, G. Weijers, N. G. Janssen, J. Busman, W. Dijk, V. Velde
{"title":"Towards an electronic patient record for cardiology: the issue of integrity of patient data","authors":"R. Hoekema, G. Weijers, N. G. Janssen, J. Busman, W. Dijk, V. Velde","doi":"10.1109/CIC.2005.1588119","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588119","url":null,"abstract":"In the Cardiology department, many different sources of clinical information are used in the daily routine. Integration of these (digital) sources into an electronic patient record is a logical step. One of the issues regarding the integration of data is the integrity of patient data: there shouldn't be any mis-registration of patient related data such as patient ID, patient name. To achieve integrity of patient data, we have now created a method to automatically transfer patient related data from one system to the other, mostly by using industry standards for communication of these data. With the integrity of these data secured, we can now proceed with the integration of the data into one system","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"357 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116932125","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}
C. Aguilar, C. Sánchez, J. J. Rieta, D. Moratal-Pérez, C. Vayá, J. M. Blas, J. Millet
{"title":"Complex detection and subtraction via wavelet, a new atrial activity extracting algorithm","authors":"C. Aguilar, C. Sánchez, J. J. Rieta, D. Moratal-Pérez, C. Vayá, J. M. Blas, J. Millet","doi":"10.1109/CIC.2005.1588260","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588260","url":null,"abstract":"In this paper, a new technique for extracting the Atrial Activity (AA) using a single-lead from surface ECG and based on Wavelet transform and adaptive filtering, is presented. Firstly, the fiducial points of each beat are detected using a Discrete Wavelet Transform (DWT). In the second stage, the dominant frequency (Fp) of the f waves segments is calculated, allowing the application of an adaptive filtering. Averaging this signal with a median complex based on Template Matching and Subtraction cancellation technique (TMS) results a signal where AA is minimum. Finally, a subtraction between the original lead and the averaged signal produces a residual signal which contains the expected AA. The presented results show that Complex Detection and Subtraction via Wavelet (CDSW) can be a highly efficient tool for the study of atrial arrhythmias in those systems with reduced number of leads, like Holter recording systems","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116764358","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}
A. Casaleggio, P. Rossi, T. Guidotto, V. Malavasi, G. Musso, G. Sartori
{"title":"Differences in mode of onset of ventricular tachyarrhythmias in dilated cardiomyopathies and coronary artery diseases","authors":"A. Casaleggio, P. Rossi, T. Guidotto, V. Malavasi, G. Musso, G. Sartori","doi":"10.1109/CIC.2005.1588063","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588063","url":null,"abstract":"This explorative study focuses on differences between the onset of spontaneous ventricular tachyarrhythmias (VT) of patients with implantable cardioverter defibrillator (ICD) and affected by coronary artery disease (CAD) or dilated cardiomyopathy (DCM). From 57 patients (40 CAD and 17 DCM), 35 (24 CAD and 11 DCM) we retrieved a total of 154 spontaneous VTs (72 CAD and 82 DCM). Three modes of VT onset are observed: (i) premature ventricular contraction (PVC); (ii) PVC preceded by a short-long-short cycle; (Hi) PVC preceded by a paced beat immediately after PVC pause. The analysis indicates that (i) average number of spontaneous VTs is much higher in DCM than CAD (7.5 vs. 3 VTs per patients in patient with VTs); (ii) modes of onset are more variable in DCM (1 patient experienced all 3 modes, 5 experienced 2 modes,) than CAD (only 2 patients experienced 2 modes) patients","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"316 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115444771","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}
J. Simonotto, M. D. Furman, W. Ditto, M. Spano, G. Liu, K. Kavanagh
{"title":"Nonlinear analysis of cardiac optical mapping data reveals ordered period in defibrillation failure","authors":"J. Simonotto, M. D. Furman, W. Ditto, M. Spano, G. Liu, K. Kavanagh","doi":"10.1109/CIC.2005.1588160","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588160","url":null,"abstract":"A high-speed video camera and voltage-sensitive dyes were used to acquire high resolution (80times80 pixels) and high-speed (500mus/frame) optical signals of ventricular fibrillation in a Langendorff-perfused porcine heart. The resulting spatiotemporal dynamics were recorded before and after the application of a defibrillation shock in order to study the mechanism of defibrillation failure. We used recurrence plots as a tool to qualify the evolution of ordered behavior on the heart surface before fibrillation was reestablished in defibrillation failure. Such ordered periods may point to robust periods in which the defibrillation attempt has had the most effect and may provide a window in which a smaller, corrective shock may be applied to achieve defibrillation","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115784595","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}
{"title":"Analysis of high-frequency qrs components obtained from body surface potential mapping in anterior myocardial infarction","authors":"M. Guillem, J. Millet, V. Bodí, A. Bollmann","doi":"10.1109/CIC.2005.1588282","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588282","url":null,"abstract":"Analysis of high frequency components of the QRS complex in the standard twelve-lead ECG has been suggested as indicator for ischemia, as significant changes in morphology and voltage amplitude have been observed. Changes in high frequency components for old myocardial infarction are less specific and their advantages over the unfiltered ECG are unclear. However, lead positions outside the standard ECG have not been explored systematically. In this study, we extend the number of leads included in high frequency QRS analysis looking for differences between controls and old anterior myocardial infarctions by applying body surface mapping. Differences in the number of leads presenting reduction in the high frequency content of the QRS complex, as well as the temporal width of this reduction, have been found between patients and normals, suggesting markers for electrocardiographic assessment of conduction slowing","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"225 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116153628","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}
S. Bauer, R. W. dos Santos, T. R. Schmal, E. Nagel, M. Baer, H. Koch
{"title":"QRS width and QT time alteration due to geometry change in modelled human cardiac magnetograms","authors":"S. Bauer, R. W. dos Santos, T. R. Schmal, E. Nagel, M. Baer, H. Koch","doi":"10.1109/CIC.2005.1588182","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588182","url":null,"abstract":"The influence of changing mesh geometries due to muscle contraction on computated biomagnetic fields of the human heart is investigated. To generate a detailed computer model of the ventricle and compare it to magnetocardiographic data, MCG and MRI were taken consecutively from the same proband. Two computer models were built from the MRI data at diastole and systole in order to assess the maximum deviation induced by geometry on the MCG. We could reproduce the structure of the measured MCG. The mesh geometry had a significant effect on the simulated magnetogram. QRS width differed by 15 ms and QT max times differed by 20 ms between the two computer-generated MCG. Consequently, models for biomagnetic heart activity should take detailed geometry change during the heart cycle into account","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114426392","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}
{"title":"Improved frequency-domain analysis of ventricular late potentials","authors":"C. Lin","doi":"10.1109/CIC.2005.1588141","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588141","url":null,"abstract":"Many methods of segment selection of various lengths and locations in the high-frequency spectral analysis of ventricular late potentials (VLPs) in signal-averaged electrocardiograms (SAECGs) have been demonstrated to yield conflicting results in clinical applications. This work compares of a new locally developed method with two existing methods for detecting VLPs in the frequency domain. A total of 154 normal individuals, 94 patients with frequent ventricular premature contraction (VPC) and 26 patients with sustained ventricular tachycardia (VT) were recruited for the study. Two existing methods use a 120 ms time segment, starting from 20 ms before spatial vector velocity <5 mV/s and vector magnitude <40 muV at the terminal QRS complex, to analyze the VLPs. A locally developed 80 ms segment, starting from 60 ms before the QRS offset, was shown to outperform these two currently adopted methods. The areas under the receiver operating curves (AUCs) of the root-mean-square amplitude (RMSA) in the 60 to 120 Hz band were 82.2% versus 60.2% and 55.2%, and the AUCs of the RMSA ratio (RMSAR) (100times[60 to 120 Hz RMSA/0 to 120 Hz RMSA]) were 77.2% versus 54.9% and 53.1%. The locally developed method, which uses the QRS offset as a reference for selecting segments is determined substantially to improve VLPs analysis in the frequency domain","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125256051","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}
{"title":"Long-term ECG trends in atherosclerotic mouse subjects","authors":"M. Oefinger, M. Krieger, R. Mark","doi":"10.1109/CIC.2005.1588198","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588198","url":null,"abstract":"The double-knockout (dKO) mouse model, with homozygous null encoding for the apoE lipoprotein molecule and SRB-I receptor, shows extremely elevated LDL and severely depressed HDL levels in blood serum. The subjects show 100% mortality by the age of 8 weeks, with accompanying cardiac hypertrophy, reduced ejection fraction and high incidence of atherosclerosis and multiple regions of myocardial infarct noted on necropsy. While these gross observations have been published previously, we now present long-term ECG trends of these subjects. Of specific note in the dKO subjects are the appearance of severe bradycardia during the night and early morning; high-amplitude ultradian rhythm fluctuations relative to wild-type mice; ST-segment elevation and depression; and an array of ECG anomalies ranging from bigeminy to 2nd and 3rd degree heart block. While the dKO mice can, and periodically do, experience self-limited episodes of ventricular tachycardia and subsequent fibrillation, the small size of the heart makes sustained re-entry and fibrillation impossible (in accordance with the critical mass hypothesis). Our study of 11 dKO subjects indicates that these subjects are not suffering a tachyarrhythmic death, but rather a progressive bradyarrhythmia and terminal asystolic cardiac arrest","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127120876","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}
{"title":"Heartscope: a software tool addressing autonomic nervous system regulat","authors":"Fabio Badilini, M. Pagani, Alberto Porta","doi":"10.1109/CIC.2005.1588086","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588086","url":null,"abstract":"The evaluation of cardiovascular control system requires ad-hoc software tools specifically designed to address the complexity of the regulation mechanisms in a multiparametric and multidisciplinary perspective. We introduce HeartScope a Windows-based C++ tool that brings together the most advanced signal processing methods for the analysis of cardiovascular regulation in a flexible and friendly framework","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124344629","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}
{"title":"Adaption of the standard 12-lead ECG system focusing on atrial electrical activity","authors":"Z. Ihara, V. Jacquemet, J. Vesin, A. van Oosterom","doi":"10.1109/CIC.2005.1588071","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588071","url":null,"abstract":"An adaptation is presented of the positioning of some of the electrodes of the standard 12-lead ECG, aimed at extracting more information on atrial activity. It uses new positions for four of the six precordial electrodes, anchored to the remaining two. Its performance was tested by applying it to ECG signals during atrial fibrillation, simulated by means of a biophysical model of human atria and thorax. This enabled the analysis to be carried out without the interference of the ventricular activity. The signals simulated on each of the two lead systems, denoted here as ECG and ACG (atriocardiogram), were compared by studying the singular values of the data matrix (size 9timesN) representing the independent information in the data. After normalization with respect to the first singular value, the singular value spectrum of the ACG lied well above that of the ECG data. The results indicate that the ACG lead system provides more information on the atrial electric activity than the standard 12-lead ECG configuration","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124372777","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}