Computers in Cardiology, 2005最新文献_第7页

Symbolic analysis of 24h holter heart period variability series: comparison between normal and heart failure patients 24h动态心脏周期变异性系列的符号分析:正常与心力衰竭患者的比较

Computers in Cardiology, 2005 Pub Date : 1900-01-01 DOI: 10.1109/CIC.2005.1588166

A. Porta, G. D'addio, G. Pinna, R. Maestri, T. Gnecchi-Ruscone, R. Furlan, N. Montano, S. Guzzetti, A. Malliani

引用次数: 18

A new ventricular fibrillation detection algorithm for automated external defibrillators 一种新的自动体外除颤器心室颤动检测算法

Computers in Cardiology, 2005 Pub Date : 1900-01-01 DOI: 10.1109/CIC.2005.1588162

A. Amann, R. Tratnig, K. Unterkofler

引用次数: 61

An original method to quantify mitochondria movement in cultured cardiomyocytes 一种量化培养心肌细胞线粒体运动的原始方法

Computers in Cardiology, 2005 Pub Date : 1900-01-01 DOI: 10.1109/CIC.2005.1588229

S. Pelloux, C. Ojeda, Y. Tourneur

引用次数: 3

Changes in ventricular refractoriness and conduction velocity induced by local hypothermia and hyperthermia 局部低温和高热引起的心室耐火度和传导速度的变化

Computers in Cardiology, 2005 Pub Date : 1900-01-01 DOI: 10.1109/CIC.2005.1588155

A. Tormos, J. Millet, F. Chorro, L. Such, J. Cánoves, L. Mainar, E. Blasco, I. Trapero

引用次数: 3

Linear prediction modeling for evaluating abnormal intra QRS potentials in the high-resolution electrocardiogram 评价高分辨率心电图QRS内异常电位的线性预测模型

Computers in Cardiology, 2005 Pub Date : 1900-01-01 DOI: 10.1109/CIC.2005.1588140

C. Lin

{"title":"Linear prediction modeling for evaluating abnormal intra QRS potentials in the high-resolution electrocardiogram","authors":"C. Lin","doi":"10.1109/CIC.2005.1588140","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588140","url":null,"abstract":"The purpose of this paper is to obtain abnormal intra-QRS potentials (AIQP) from a signal-averaged electrocardiogram (SAECG) have been proposed to indicate the risk of ventricular arrhythmias. However, the major limitation of current autoregressive moving average modeling is that the model order depends on the database. This study presented a new method based on the linear prediction modeling to improve the limits in AIQP analysis. A total of 154 normal Taiwanese (N), 94 ventricular premature contraction (VPC) patients and 26 sustained ventricular tachycardia (VT) patients were recruited. The AIQP were extracted from the modeling residual of a linear prediction model. From the analyses of all modeling residual curves (modeling residual versus model order), the optimal model order is six. The AIQP was quantified by the root-mean-square value of the modeling residual within QRS interval. The AIQP of VT patients were significantly greater than those of non-VT groups (normal and VPC groups) (p<0.05). No significant differences appeared between normal and VPC groups. A linear combination of AIQP in leads X, Y and Z and three standardized time-domain SAECG parameters provide the best diagnostic performance (specificity 85.9%, sensitivity 88.5% and predictive accuracy 86.2%). It is concluded that the AIQP can be extracted by the linear prediction modeling to evaluate the risk of ventricular arrhythmias, which can enhance the diagnostic performance of time-domain SAECG. And, the linear prediction modeling improves the clinical feasibility of AIQP analysis","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"27 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":"134299258","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

Detect short run of TWA event with time-domain algorithm 用时域算法检测TWA事件的短时运行

Computers in Cardiology, 2005 Pub Date : 1900-01-01 DOI: 10.1109/CIC.2005.1588142

B. Hostetler, J. Xue, B. Young, W. Kaiser, M. Findeis, D. Gutterman

引用次数: 16

Opportunities for optimization of biventricular pacing using an implanted hemodynamic monitor 利用植入式血流动力学监测器优化双室起搏的机会

Computers in Cardiology, 2005 Pub Date : 1900-01-01 DOI: 10.1109/CIC.2005.1588049

H. J. Bruns, F. Braunschweig, D. Ersgård, M. Stalberg, P. Reiters, P. Grandjean, K. Hilpisch, C. Linde, M. Hill

引用次数: 1

Savitzky-Golay least-squares polynomial filters in ECG signal processing 心电信号处理中的Savitzky-Golay最小二乘多项式滤波器

Computers in Cardiology, 2005 Pub Date : 1900-01-01 DOI: 10.1109/CIC.2005.1588216

S. Hargittai

引用次数: 111

Mapping myocardial perfusion with an intravascular MR contrast agent, a robust estimation by a spatially constrained approach 用血管内磁共振造影剂绘制心肌灌注图，通过空间约束方法进行稳健估计

Computers in Cardiology, 2005 Pub Date : 1900-01-01 DOI: 10.1109/CIC.2005.1588123

B. Neyran, S. Carme, M. Wiart, M. Robini, E. Soulas

{"title":"Mapping myocardial perfusion with an intravascular MR contrast agent, a robust estimation by a spatially constrained approach","authors":"B. Neyran, S. Carme, M. Wiart, M. Robini, E. Soulas","doi":"10.1109/CIC.2005.1588123","DOIUrl":"https://doi.org/10.1109/CIC.2005.1588123","url":null,"abstract":"Evaluation of quantitative parameters such as regional myocardial blood flow (rMBF), blood volume (rMBV), and mean transit time (rMTT) by MRI is gaining acceptance for clinical applications, but still lacks robust post-processing methods for map generation. Pixel by pixel analysis leads to high variance of the estimates and variance reduction by posterior spatial averaging does not produce satisfactory results. We propose a parametric estimation technique that smoothes the variance of the estimates within parametric homogeneous regions while preserving discontinuities (in the sense that smoothing is not performed across regions with different parametric contents). Our approach lies within the Bayesian framework. It is based on local autoregressive moving average (ARMA) estimation, constrained by an edge-preserving smoothness prior. The prior stems from Markov random fields (MRF) modeling and involves non-quadratic potential functions. The output of the resulting algorithm is a regularized rMBF map. The method is validated on synthetic MR kinetics and tested on first-pass T1 images of an isolated pig heart using an intravascular contrast agent. Comparison of our results with pixel by pixel estimates clearly demonstrate the ability of the proposed approach to improve parametric estimation in terms of variance reduction and discontinuity preservation","PeriodicalId":239491,"journal":{"name":"Computers in Cardiology, 2005","volume":"7 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":"124793700","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

Towards automatic full heart segmentation in computed-tomography images 计算机断层扫描图像中全心脏自动分割的研究

Computers in Cardiology, 2005 Pub Date : 1900-01-01 DOI: 10.1109/CIC.2005.1588077

O. Ecabert, J. Peters, C. Lorenz, J. von Berg, M. Vembar, K. Subramanyan, G. Lavi, J. Weese

引用次数: 20