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2008 Computers in Cardiology最新文献

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A pediatric shock advice algorithm based on the regularity of the detected beats 一种基于检测到的心跳规律的儿科休克建议算法
2008 Computers in Cardiology Pub Date : 2008-09-01 DOI: 10.1109/CIC.2008.4749221
U. Irusta, J. Ruiz, S. R. D. Gauna, E. Aramendi
{"title":"A pediatric shock advice algorithm based on the regularity of the detected beats","authors":"U. Irusta, J. Ruiz, S. R. D. Gauna, E. Aramendi","doi":"10.1109/CIC.2008.4749221","DOIUrl":"https://doi.org/10.1109/CIC.2008.4749221","url":null,"abstract":"Automated external defibrillators (AED) detect fatal ventricular arrhythmias: ventricular fibrillation (VF) and ventricular tachycardia (VT). We have developed an algorithm based on the regularity of the detected beats to accurately discriminate VF from nonshockable rhythms in pediatric patients.The beat detection method is based on a preprocessing band pass filter (5-35 Hz) followed by a nonlinear energy operator (NEO). The discrimination algorithm uses three parameters: the number of detected beats, the coefficient of variation of the interval between beats and the content around the zero line of the output of NEO. The values of these parameters were used in a decision tree that identified irregular shockable rhythms (VF), and slow and fast regular rhythms, classified as nonshockable. VT was excluded in the design of the algorithm because it is often a regular but shockable rhythm. The algorithm was tested on a database of 1091 records (959 nonshockable, 62 VF and 70 VT) from 650 pediatric patients. The specificity was 99.7% and the VF sensitivity was 96.6%. 33% of the VT windows were identified as shockable, 65.2% as fast nonshockable and 1.8% as slow nonshockable. The regularity of the detected beats can accurately discriminate VF from nonshockable rhythms. However, an additional stage to discriminate fast nonshockable rhythms from fast and regular VT is needed for a shock advice algorithm.","PeriodicalId":194782,"journal":{"name":"2008 Computers in Cardiology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126570027","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}
引用次数: 2
Characterization of Heart Rate Variability loss with aging and heart failure using Sample Entropy 使用样本熵表征心率变异性随衰老和心力衰竭的损失
2008 Computers in Cardiology Pub Date : 2008-09-01 DOI: 10.1109/CIC.2008.4748972
R. Goya-Esteban, J. D. de Sá, J. Rojo-Alvarez, Ó. Barquero-Pérez
{"title":"Characterization of Heart Rate Variability loss with aging and heart failure using Sample Entropy","authors":"R. Goya-Esteban, J. D. de Sá, J. Rojo-Alvarez, Ó. Barquero-Pérez","doi":"10.1109/CIC.2008.4748972","DOIUrl":"https://doi.org/10.1109/CIC.2008.4748972","url":null,"abstract":"Entropy based measures, such as Sample Entropy (SampEn), have been widely used for quantifying the Heart Rate Variability (HRV) for cardiac risk stratification purposes, with the hypothesis that decreasing entropy points to a perturbation of the complex physiological mechanisms or disease. However, in the literature, higher entropy values have been reported for some pathologies than for healthy subjects, which could be due to the use of a threshold value r tuned relative to the signal standard deviation. In the present paper we apply SampEn to assess the variability of the RR time series from healthy subjects and subjects with Congestive Heart Failure (CHF) in order to discriminate between both groups, as well as to characterize the variability loss due to aging. We conclude that the use of a fixed threshold value r in the SampEn algorithm instead of its conventional setting (as a percentage of the standard deviation of each data series), improves the discrimination capabilities between healthy and CHF subjects, and it allows to quantify the loss of HRV due to aging in healthy subjects.","PeriodicalId":194782,"journal":{"name":"2008 Computers in Cardiology","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121094123","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}
引用次数: 17
Effect of heart motion on the solutions of forward and inverse electrocardiographic problem - a simulation study 心脏运动对心电图正逆问题解的影响——模拟研究
2008 Computers in Cardiology Pub Date : 2008-09-01 DOI: 10.1109/CIC.2008.4749054
Y. Jiang, D. Farina, O. Doessel
{"title":"Effect of heart motion on the solutions of forward and inverse electrocardiographic problem - a simulation study","authors":"Y. Jiang, D. Farina, O. Doessel","doi":"10.1109/CIC.2008.4749054","DOIUrl":"https://doi.org/10.1109/CIC.2008.4749054","url":null,"abstract":"Solving the forward problem of electrocardiography provides a better understanding of electrical activities in the heart. The inverse problem of electrocardiography enables a direct view of cardiac sources without catheter interventions. Today the forward and inverse computation is most often performed in a static model, which doesnpsilat take into account the heart motion and may result in considerable errors in both forward and inverse solutions. In this work a dynamic heart model is developed. With this model the effect of the heart motion on the forward and inverse solutions is investigated.","PeriodicalId":194782,"journal":{"name":"2008 Computers in Cardiology","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116680668","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}
引用次数: 5
Quasi-periodic atrial activity components in the ECG used to discriminate between paroxysmal and chronic atrial fibrillation 准周期性心房活动成分在ECG用于区分阵发性和慢性心房颤动
2008 Computers in Cardiology Pub Date : 2008-09-01 DOI: 10.1109/CIC.2008.4749168
M. Lemay, L. Dang, J. Vesin
{"title":"Quasi-periodic atrial activity components in the ECG used to discriminate between paroxysmal and chronic atrial fibrillation","authors":"M. Lemay, L. Dang, J. Vesin","doi":"10.1109/CIC.2008.4749168","DOIUrl":"https://doi.org/10.1109/CIC.2008.4749168","url":null,"abstract":"Spatiotemporal organization in atrial fibrillation has recently been observed in invasive studies with a left-to-right frequency gradient. We propose the use of a recently developed technique named phase-rectified signal averaging to estimate the mean activation rates in leads V1 and V5 to observe the same left-to-right gradient in a noninvasive manner. Based on these values, a classification procedure between paroxysmal (n=43) and chronic (n=20) atrial fibrillation patient is suggested. The processing steps were: baseline correction and ventricular activity cancellation, followed by the phase-rectified signal averaging technique. The three features used were the dominant frequency values of leads V1 and V5 and the absolute value of the difference between these frequencies. These yielded to 84.1% of correct classifications (p < 8.5 times 10-7).","PeriodicalId":194782,"journal":{"name":"2008 Computers in Cardiology","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116551592","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}
引用次数: 2
An interactive cardiac tele rehabilitation program using a mobile device 使用移动设备的交互式心脏远程康复计划
2008 Computers in Cardiology Pub Date : 2008-09-01 DOI: 10.1109/CIC.2008.4749028
X. Chen, C.T. Ho, E. Lim
{"title":"An interactive cardiac tele rehabilitation program using a mobile device","authors":"X. Chen, C.T. Ho, E. Lim","doi":"10.1109/CIC.2008.4749028","DOIUrl":"https://doi.org/10.1109/CIC.2008.4749028","url":null,"abstract":"Patients recovering from a cardiac surgery need to undergo regular checkups and physical rehabilitation exercises at their local rehabilitation centers. It is time-consuming and not personalized for each individual. Moreover, the stigma and emotional stress of re-visiting the rehabilitation center for some patients may prove to be more debilitating. With increasing pervasiveness of powerful mobile devices like pocket PC and Smartphone, this paper proposes a personalized mobile rehabilitation coaching program for mobile devices. It allows patients to perform their own cardiac fitness exercises and tests and forward their results to their physicians for assessment. Personalization in the rehabilitation exercises and test programs is achieved by the physicians by allowing direct communication with the patients and adjustments in the parameters via the testing program. A preliminary study has been conducted to evaluate the effectiveness of utilizing this personalized mobile rehabilitation program.","PeriodicalId":194782,"journal":{"name":"2008 Computers in Cardiology","volume":"567 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114057521","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}
引用次数: 0
Respiration analysis of the sternal Ballistocardiograph signal 胸骨弹道心动图信号的呼吸分析
2008 Computers in Cardiology Pub Date : 2008-09-01 DOI: 10.1109/CIC.2008.4749063
K. Tavakolian, Bozena Kaminska, A. Vaseghi, H. Kennedy-Symonds
{"title":"Respiration analysis of the sternal Ballistocardiograph signal","authors":"K. Tavakolian, Bozena Kaminska, A. Vaseghi, H. Kennedy-Symonds","doi":"10.1109/CIC.2008.4749063","DOIUrl":"https://doi.org/10.1109/CIC.2008.4749063","url":null,"abstract":"In this research a new approach for processing of ballistocardiograph (BCG) signal is proposed in which, the respiration information is utilized to improve the averaging of the BCG signal. This method is based on our analysis that BCG cycles corresponding to the inspiration and expiration phases of respiration cycle are different in morphology. The new BCG average calculated based on this methodology is then considered as the template of the BCG signal for further processing and can be considered as the output of a clinical BCG instrument.","PeriodicalId":194782,"journal":{"name":"2008 Computers in Cardiology","volume":"15 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125624585","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}
引用次数: 7
PAOLINA (PAziente on LINe, Ambulatoriale) as a web application for facilitating the storage and the management of self-measured blood pressure data PAOLINA (PAziente on LINe, Ambulatoriale)是一个便于存储和管理自测血压数据的web应用程序
2008 Computers in Cardiology Pub Date : 2008-09-01 DOI: 10.1109/CIC.2008.4749185
G. Djukić, L. Mezzasalma, L. Serasini, S. Ghione
{"title":"PAOLINA (PAziente on LINe, Ambulatoriale) as a web application for facilitating the storage and the management of self-measured blood pressure data","authors":"G. Djukić, L. Mezzasalma, L. Serasini, S. Ghione","doi":"10.1109/CIC.2008.4749185","DOIUrl":"https://doi.org/10.1109/CIC.2008.4749185","url":null,"abstract":"Introduction. Self-measurement of blood pressure at home (a.k.a. home blood pressure = HBP) is accepted by the international medical guidelines as an effective procedure for the management of arterial hypertension and is increasingly popular among hypertensive patients. This, however, transfers on the patientspsila side the responsibility of data acquisition, storage and management. PAOLINA represents a Web application that allows the patients at home, to input, store and consult their own home pressure measurements. At the same time, it permits the consultation of the data by authorized health providers. The system favours a more correct use of acquired information and provides guidelines for the proper method of long-term HBP monitoring. The system is a pilot study with the aim of achieving greater and more proper involvement of the patient at the same time making easier and more efficient his interaction with the health facility, by moving whenever possible, the information rather than the patient.","PeriodicalId":194782,"journal":{"name":"2008 Computers in Cardiology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132846928","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}
引用次数: 2
Design of new reliable CFD-based estimation of flow rate: Early in-vivo results 设计新的可靠的基于cfd的流量估计:早期体内结果
2008 Computers in Cardiology Pub Date : 2008-09-01 DOI: 10.1109/CIC.2008.4749201
R. Ponzini, C. Vergara, A. Veneziani, A. Redaelli
{"title":"Design of new reliable CFD-based estimation of flow rate: Early in-vivo results","authors":"R. Ponzini, C. Vergara, A. Veneziani, A. Redaelli","doi":"10.1109/CIC.2008.4749201","DOIUrl":"https://doi.org/10.1109/CIC.2008.4749201","url":null,"abstract":"In the present work a new approach for the blood flow rate estimate is discussed together with the performances results on both computational fluid dynamics and in vivo datasets. In the mean time the comparison of this new method against the standard one used in clinics during catheterization in Doppler based flow rate estimate is provided showing important limitation of the latter and possible concrete enhancements using the new one proposed herein.","PeriodicalId":194782,"journal":{"name":"2008 Computers in Cardiology","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133616513","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}
引用次数: 1
In-vitro investigation of very long defibrillation shocks: Design and testing of a capacitor-free defibrillator 超长时间除颤的体外研究:无电容除颤器的设计和测试
2008 Computers in Cardiology Pub Date : 2008-09-01 DOI: 10.1109/CIC.2008.4749086
M. Triventi, E. Mattei, A. Delogu, F. Censi, G. Calcagnini, P. Bartolini, F. Aguel, J. Stohlman, V. Krauthamer
{"title":"In-vitro investigation of very long defibrillation shocks: Design and testing of a capacitor-free defibrillator","authors":"M. Triventi, E. Mattei, A. Delogu, F. Censi, G. Calcagnini, P. Bartolini, F. Aguel, J. Stohlman, V. Krauthamer","doi":"10.1109/CIC.2008.4749086","DOIUrl":"https://doi.org/10.1109/CIC.2008.4749086","url":null,"abstract":"The aim of this paper is to describe a defibrillator that allows the delivery of arbitrary waveform shocks, with energy up to 10J and duration up to 100 ms. In addition, data from shocks delivered to isolated rabbitpsilas hearts are presented. The solutions adopted in the design and realization of the defibrillator were: rechargeable battery power; linear AB class power amplifier output in bridge configuration; optical isolation of analog and digital lines to and from the PC and earth ground; measure of the actual voltage, current and energy delivered to the load. Laboratory testing showed that the defibrillator is capable to deliver shocks with a rising time less than 150 us, no tilting also for very long waveforms (100 ms), peak current up to 10 A. The system was then used on rabbit hearts to define a protocol to investigate the effect of waveform duration on defibrillation threshold. We demonstrate the feasibility of an experimental defibrillator for the generation and delivery of true arbitrary waveforms.","PeriodicalId":194782,"journal":{"name":"2008 Computers in Cardiology","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133897183","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}
引用次数: 0
Designing an alarm system for the stratification of risk of cardiac arrhythmias 心律失常危险分层报警系统设计
2008 Computers in Cardiology Pub Date : 2008-09-01 DOI: 10.1109/CIC.2008.4749222
E. Alvarez, J. Jiménez, F. Moleiro, A. Rodriguez
{"title":"Designing an alarm system for the stratification of risk of cardiac arrhythmias","authors":"E. Alvarez, J. Jiménez, F. Moleiro, A. Rodriguez","doi":"10.1109/CIC.2008.4749222","DOIUrl":"https://doi.org/10.1109/CIC.2008.4749222","url":null,"abstract":"The idea of this research is to propose an alarm system that can alert the early establishment of an event paroxysmal ventricular tarquicardia (PVT), from study of heart rate variability (HRV). The study of the variability is support in the frequency of abnormal patterns prior to the events. We select and analyze in detail 24 hours records from dynamic electrocardiography (Holter). We selected 88 one-hour segments prior to the events of PVT, and once analyzed the system found an efficiency of 77% in early detection of the establishment of the arrhythmia, with an average prediction time of 43 plusmn 8 minutes distant from events, statistically significant result. To assess the percentage of false alarms we evaluate 103 hours from control healthy subjects, resulting in a specificity of 85%.","PeriodicalId":194782,"journal":{"name":"2008 Computers in Cardiology","volume":"14 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133110802","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}
引用次数: 0
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