2015 Computing in Cardiology Conference (CinC)最新文献_第9页

Cardiac resynchronization efficiency estimation by new ultra-high-frequency ECG dyssynchrony descriptor 新的超高频心电非同步化描述符估计心脏再同步化效率

2015 Computing in Cardiology Conference (CinC) Pub Date : 2015-09-01 DOI: 10.1109/CIC.2015.7410964

Tereza Reichlova, P. Jurák, J. Halámek, F. Plesinger, J. Lipoldova, M. Novak, P. Leinveber

{"title":"Cardiac resynchronization efficiency estimation by new ultra-high-frequency ECG dyssynchrony descriptor","authors":"Tereza Reichlova, P. Jurák, J. Halámek, F. Plesinger, J. Lipoldova, M. Novak, P. Leinveber","doi":"10.1109/CIC.2015.7410964","DOIUrl":"https://doi.org/10.1109/CIC.2015.7410964","url":null,"abstract":"The biventricular implantable pacemaker (BiV) is usually recommended for heart failure patients with LVEF ≤ 35% and QRS duration > 120ms. We introduce promising marker evaluating suitability and efficiency of the Cardiac Resynchronization Therapy (CRT) recipients. Data: 12-lead UHF-ECG, 25 kHz sampling, 10 minute resting measurement, 28 CRT subjects, each before BiV and with BiV on, VV delay o. Methods: A new parameter D YS was computed as the time diference between two maxima of UHF envelopes computed from VI and V6 leads in QRS complex in 500-1000Hz frequency band. The values of DYS and QRS width before and after BiV implantation are analysed. The assumption for being responder for BiV is high value of DYS before CRT and significant DYS decrease during biventricular pacing. Subjects with no response on BiV stimulation are under the borderline of DYS = 30ms before stimulation. Thus the D YS parameter can serve as a new marker for the prediction of Bi V pacemaker efficiency. This information cannot be derived from standard QRS width values prior BiV implantation.","PeriodicalId":414802,"journal":{"name":"2015 Computing in Cardiology Conference (CinC)","volume":"441 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121462506","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: 3

Evolution of the Heart Rate Variability complexity during Kangchenjunga climbing 康城章嘉攀爬过程中心率变异性复杂性的演化

2015 Computing in Cardiology Conference (CinC) Pub Date : 2015-09-01 DOI: 10.1109/CIC.2015.7411090

Ó. Barquero-Pérez, R. Goya-Esteban, A. Caamaño, E. Sarabia-Cachadiña, Carlos Martínez-García, J. Rojo-álvarez

{"title":"Evolution of the Heart Rate Variability complexity during Kangchenjunga climbing","authors":"Ó. Barquero-Pérez, R. Goya-Esteban, A. Caamaño, E. Sarabia-Cachadiña, Carlos Martínez-García, J. Rojo-álvarez","doi":"10.1109/CIC.2015.7411090","DOIUrl":"https://doi.org/10.1109/CIC.2015.7411090","url":null,"abstract":"At high altitude there is a reduced oxygen pressure in the atmosphere which results in physiological changes. Heart Rate Variability (HRV) is a technique to quantify the autonomic nervous system (ANS) regulation of the heart rate, allowing a noninvasive assessment of the ANS in extreme environments. The aim of this work was to assess the evolution of the HRV complexity during Kangchenjunga (8.586 m) climbing. Five spanish climbers recorded their RR-interval time series every day during the expedition. We divided the data in different stages: Spain Baseline, Kathmandu Baseline, Acclimation Trekking, Kathmandu After Acclimation, Base Camp 1, Base Camp 2, Summit, Base Camp 3, and Kathmandu after expedition. At the submission time we had acces only to complete recordings from one climber. We assessed the complexity of HRV using sample entropy (SampEn) and normalized compression distance (NCD), which exploits linear and nonlinear relations in the data and allows the comparison of sequences of different sizes. We estimated the dissimilarity of every stage in the climb against the first stage. From the beginning and during acclimation dissimilarity (NCD) increased and then decreased once the climbers were acclimated. Dissimilarity jumped up in Base Camp stage and then decreased from that point until the end of the expedition. Both indices showed an initial change in the complexity until the Summit and from the Summit both showed a tendency to recover the complexity of the HRV. Results showed that NCD is able to measure the changes in complexity with a little more detail and smoother than SampEn.","PeriodicalId":414802,"journal":{"name":"2015 Computing in Cardiology Conference (CinC)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121526022","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

Epicardial-limited electrophysiological heterogeneities do not facilitate ventricular arrhythmia induction. An experimental study 心外膜受限电生理异质性不促进室性心律失常的诱导。实验研究

2015 Computing in Cardiology Conference (CinC) Pub Date : 2015-09-01 DOI: 10.1109/CIC.2015.7411007

A. Guill, A. Tormos, C. Calvo, Eduardo Roses-Albert, A. Cebrián, L. Such-Miquel, L. Such, M. Zarzoso, F. Chorro, J. Millet-Roig

{"title":"Epicardial-limited electrophysiological heterogeneities do not facilitate ventricular arrhythmia induction. An experimental study","authors":"A. Guill, A. Tormos, C. Calvo, Eduardo Roses-Albert, A. Cebrián, L. Such-Miquel, L. Such, M. Zarzoso, F. Chorro, J. Millet-Roig","doi":"10.1109/CIC.2015.7411007","DOIUrl":"https://doi.org/10.1109/CIC.2015.7411007","url":null,"abstract":"The electrophysiological heterogeneities of the myocardium are associated with vulnerability to arrhythmias. This study presents an experimental heterogeneity model based on local epicardial cooling/warming. The ventricular activation-recovery interval (ARl), conduction velocity (CV) and arrhythmogenic response to electrical pacing were determined. Electrical mapping was carried out on isolated rabbit hearts (n=8), using a specific electrode device for epicardial temperature control. With respect to baseline, ARl in the modified zone was prolonged (137 ± 22 ms vs 111 ± 13 ms, p<;0.05) under maximum hypothermia (22.3 ± 0.6 °C vs 36.7 ± 0.8 DC), and was shortened (98 ± 13 ms vs 107 ± 16 ms, p<;0.05) under conditions of hyperthermia (41.8 ± 0.3 °C vs 37.3 ± 0.4 DC). CV decreased (70 ± 17 cm/s vs 76 ± 17 cm/s, p<;0.05) under hypothermia and increased (79 ± 20 cm/s vs 75 ± 21 cm/s, p<;0.05) under hyperthermia. There were no changes in the unmodified zone. Repetitive responses were observed in four hearts, with no dependency between the appearance of responses and the induced modifications. Thermally induced dispersion of ARl and CV did not favor the induction of ventricular arrhythmias, probably because only a limited zone of the ventricular epicardium was affected.","PeriodicalId":414802,"journal":{"name":"2015 Computing in Cardiology Conference (CinC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124595878","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

Aortic-finger pulse transit time vs. R-derived Pulse Arrival Time: A beat-to-beat assessment 主动脉-指脉传递时间与r脉到达时间:搏动评估

2015 Computing in Cardiology Conference (CinC) Pub Date : 2015-09-01 DOI: 10.1109/CIC.2015.7408634

E. Vaini, P. Lombardi, M. Rienzo

引用次数: 2

Identification of ECG signal pattern changes to reduce the incidence of Ventricular Tachycardia false alarms 识别心电信号模式变化，减少室性心动过速虚警的发生

2015 Computing in Cardiology Conference (CinC) Pub Date : 2015-09-01 DOI: 10.1109/CIC.2015.7411130

Vytautas Abromavičius, A. Serackis, Andrius Gudiskis

{"title":"Identification of ECG signal pattern changes to reduce the incidence of Ventricular Tachycardia false alarms","authors":"Vytautas Abromavičius, A. Serackis, Andrius Gudiskis","doi":"10.1109/CIC.2015.7411130","DOIUrl":"https://doi.org/10.1109/CIC.2015.7411130","url":null,"abstract":"The paper focuses on the reduction of the false alarms in the Intensive Care Units (ICU). Five alarm types were analyzed in this study: Asystole, Extreme Bradycardia, Extreme Tachycardia, Ventricular Tachycardia and Ventricular Flutter/Fibrillation. Most of the analyzed alarm types rely on the quality of the heart rate estimation. The false alarm reduction algorithms analyzed in this paper use the quality estimate of the arterial blood pressure signal from which the heart rate is estimated and additionally the results of heart beat detection in two ECG signals are analyzed before making the final decision about the true or false alarm type. The most attention in this paper is focused on the correct detection of Ventricular Tachycardia alarms. The decision about the true or false alarm is made according to RR interval variation and changes of QRS complex shape features. A subset of sample entries data of the Physionet/CinC Challenge 2015 is used to test the proposed algorithm modifications. The false alarm detection according to the RR interval variation gave 49% TPR, 49% TNR (score 34.82) for the Phase I Entries data set and 46% TPR, 51% TNR (score 34.59) for the Phase II Entries data set. The VT alarm detection algorithm based on the features related to the the ECG waveform shape has increased the VT score for Phase I Entries data set to 41.98.","PeriodicalId":414802,"journal":{"name":"2015 Computing in Cardiology Conference (CinC)","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122383872","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: 9

Hemodialysis-induced ST-segment deviation 血液透析引起的st段偏曲

2015 Computing in Cardiology Conference (CinC) Pub Date : 2015-09-01 DOI: 10.1109/CIC.2015.7411115

I. Simova, I. Christov, G. Bortolan, R. Abächerli, Liliana Kambova, I. Jekova

引用次数: 6

Customizing the bull's-eye to improve the clinician's diagnostic intuition 定制靶心，提高临床医生的诊断直觉

2015 Computing in Cardiology Conference (CinC) Pub Date : 2015-09-01 DOI: 10.1109/CIC.2015.7408655

E. Ferdeghini, V. Positano, G. Bella, A. Pingitore, D. Rovai

引用次数: 0

A comparison study between fainter and non-fainter subjects during head-up tilt test using reconstructed phase space 基于重构相空间的昏厥与非昏厥受试者平视倾斜试验的比较研究

2015 Computing in Cardiology Conference (CinC) Pub Date : 2015-09-01 DOI: 10.1109/CIC.2015.7411111

N. Khodor, G. Carrault, D. Matelot, N. Ville, F. Carré, Alfredo I. Hernández

{"title":"A comparison study between fainter and non-fainter subjects during head-up tilt test using reconstructed phase space","authors":"N. Khodor, G. Carrault, D. Matelot, N. Ville, F. Carré, Alfredo I. Hernández","doi":"10.1109/CIC.2015.7411111","DOIUrl":"https://doi.org/10.1109/CIC.2015.7411111","url":null,"abstract":"The analysis of cardiac dynamics based on time series extracted from cardiovascular signals (e.g. electrocardiogram, blood pressure) is relevant for differentiating between normal and pathological cases with feasible functions in the diagnosis and risk estimation. In this study, the dynamic behavior of cardiovascular time series is analyzed using reconstructed phase space to identify differences between subjects who developed syncope during head-up tilt test (fainters) and others who did not (non-fainters). Electrocardiogram and arterial blood pressure were recorded from 29 non-fainter and 28 fainter subjects. RR-interval, Amplitude of Systolic blood pressure (AmpS), peak amplitude of the first derivative of blood pressure (dPdt_max) and Pulse Transit Time (PTT) were extracted. Different features, such as the phase space density and indices derived from the recurrence quantification analysis, were computed from the phase space area of the above cited time series. In order to identify fainter and non-fainter groups, we selected the most pertinent parameters using Relief method to be used for further classification by K-nearest neighbor. The results show that the performance of the classification is approximately the same in all these time series with sensitivity (Se) near to 66.5% and specificity (Sp) around 62% during the first 5min of supine position. These values increase in the first 15min of tilted position to Se= 67% and Sp= 73%. Using an optimal fusion node, we demonstrate that the joint analysis of RR and dPdt_max provides a sensibility around 95% and a specificity of 87%. This analysis suggests that a bivavariate analysis enhances the classification performance, and help predict the outcome of the HUTT.","PeriodicalId":414802,"journal":{"name":"2015 Computing in Cardiology Conference (CinC)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130046269","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

Estimation of aortic pulse wave transit time in MRI using complex wavelet cross-spectrum analysis 用复小波交叉谱分析估计MRI主动脉脉波传递时间

2015 Computing in Cardiology Conference (CinC) Pub Date : 2015-09-01 DOI: 10.1109/CIC.2015.7411013

I. Bargiotas, É. Mousseaux, Wen-Chung Yu, B. Venkatesh, E. Bollache, A. de Cesare, Joao A. C. Lima, A. Redheuil, N. Kachenoura

{"title":"Estimation of aortic pulse wave transit time in MRI using complex wavelet cross-spectrum analysis","authors":"I. Bargiotas, É. Mousseaux, Wen-Chung Yu, B. Venkatesh, E. Bollache, A. de Cesare, Joao A. C. Lima, A. Redheuil, N. Kachenoura","doi":"10.1109/CIC.2015.7411013","DOIUrl":"https://doi.org/10.1109/CIC.2015.7411013","url":null,"abstract":"Aortic pulse wave velocity (PWV) increases with arterial stiffness and aging and predicts cardiovascular mortality. It is commonly estimated using applanation tonometry at carotid and femoral arterial sites (cfPWV). Although cardiovascular MRI offers reliable segmental measurement of arterial length, accurate transit time (TT) determination between flow curves remains a challenge. We developed a wavelet-based method, which enables temporal localization of signal frequencies, to estimate TT by the weighted phase difference between ascending and descending aorta flow curves. We compared this approach in terms of linear correlations with age, cfPWV and effects of decreasing temporal resolution by factors of 2, 3 and 4, with previous methods which 1) restrict their analysis to systolic upslope (time domain upslopes-archPWVTU) and 2) decompose into harmonics flow curves from the whole cardiac cycle (Fourier-based-archPWVF-robust to low temporal resolution). We studied 71 healthy subjects (45±15 years, 29 females) who underwent MRI velocity acquisitions and cfPWV measurements. Wavelet method provided the highest linear correlations with age and cfPWV and was the most robust to low temporal resolutions. Wavelet method might help to overcome current limitations related to MRI low temporal resolution.","PeriodicalId":414802,"journal":{"name":"2015 Computing in Cardiology Conference (CinC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129438759","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

Suppression of false arrhythmia alarms using ECG and pulsatile waveforms 利用心电图和脉冲波形抑制假心律失常报警

2015 Computing in Cardiology Conference (CinC) Pub Date : 2015-09-01 DOI: 10.1109/CIC.2015.7411019

Paula Couto, Rúben Ramalho, Rui Rodrigues

引用次数: 31