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Standalone dry electrode-sensors for multilead ECG monitoring in mobile patients 用于移动患者多导联心电图监测的独立干电极传感器
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847502
O. Chételat, Ramun Schmid, O. Grossenbacher, M. Rapin, Jacques-André Porchet, C. Meier, R. Abächerli
{"title":"Standalone dry electrode-sensors for multilead ECG monitoring in mobile patients","authors":"O. Chételat, Ramun Schmid, O. Grossenbacher, M. Rapin, Jacques-André Porchet, C. Meier, R. Abächerli","doi":"10.1109/ESGCO.2014.6847502","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847502","url":null,"abstract":"Nowadays, standalone dry electrode-sensors allow for acquiring ECGs with a signal quality similar to those of standard ECG recorders. Moreover, standalone electrode-sensors are much easier to connect than the usual electrodes and do not require a specific electronic box for the recorder (the measured biopotentials are recorded directly in the electrode-sensors). This results in very high overall integration, and increased comfort and reliability. The main innovation presented in this paper is the circuit and mechanism (patent pending) allowing perfect synchronization of all the attached standalone electrode-sensors.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134356712","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
Information dynamics in cardiorespiratory time series during mental stress testing 心理压力测试中心肺时间序列的信息动态
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847500
D. Widjaja, A. Montalto, E. Vlemincx, Daniele Marinazzo, L. Faes, S. Van Huffel
{"title":"Information dynamics in cardiorespiratory time series during mental stress testing","authors":"D. Widjaja, A. Montalto, E. Vlemincx, Daniele Marinazzo, L. Faes, S. Van Huffel","doi":"10.1109/ESGCO.2014.6847500","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847500","url":null,"abstract":"In this study, we assessed the information dynamics of respiration and heart rate variability during mental stress testing by means of the cross-entropy, a measure of cardiorespiratory coupling, and the self-entropy of the tachogram conditioned to the knowledge of respiration. Although stress is related to a reduction in vagal activity, no difference in cardiorespiratory coupling was found when 5 minutes of rest and stress were compared. The conditional self-entropy, on the other hand, showed significantly higher values during stress, indicating a higher predictability of the tachogram. These results show that entropy analyses of cardiorespiratory data reveal new information that could not be obtained with traditional heart rate variability studies.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134429459","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
Blood flow oscillatory patterns in single vessels of rat pial microcirculation evaluated by laser speckle imaging 激光散斑成像评价大鼠头部微循环单血管血流振荡模式
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847588
D. Lapi, T. Mastantuono, M. Cesarelli, G. D'Addio, M. Romano, P. Bifulco, A. Gorbach, A. Colantuoni
{"title":"Blood flow oscillatory patterns in single vessels of rat pial microcirculation evaluated by laser speckle imaging","authors":"D. Lapi, T. Mastantuono, M. Cesarelli, G. D'Addio, M. Romano, P. Bifulco, A. Gorbach, A. Colantuoni","doi":"10.1109/ESGCO.2014.6847588","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847588","url":null,"abstract":"The present study was aimed to assess blood flow oscillatory patterns in rat pial microcirculation by laser speckle imaging. Laser speckle methods provides maps of cerebral blood flow with elevated temporal and spatial resolution. The study was carried out on male Wistar rats. An open cranial window was prepared on the parietal region. Pial arterioles were classified by Strahler method in five orders by fluorescence microscopy. The blood flow oscillatory patterns were determined by laser speckle imaging in single pial vessels. Power spectrum analysis was performed by wavelet methods under baseline conditions. Arterioles and venules were characterized by blood flow oscillations with frequency components in the ranges 0.005-0.0095 Hz, 0.0095-0.02 Hz, 0.02-0.15 Hz, 0.15-0.5 Hz. Arterioles showed oscillations with higher total power and higher spectral density in the range 0.02-0.15 when compared with venules. Laser speckle imaging allowed us to evaluate arteriolar and venular blood flow oscillations.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116751558","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
Evaluation of causality measures based on non-uniform embedding schemes with application to the cardiovascular system 基于非均匀嵌入方案的因果度量评价及其在心血管系统中的应用
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847601
P. Laiou, R. Andrzejak, D. Kugiumtzis
{"title":"Evaluation of causality measures based on non-uniform embedding schemes with application to the cardiovascular system","authors":"P. Laiou, R. Andrzejak, D. Kugiumtzis","doi":"10.1109/ESGCO.2014.6847601","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847601","url":null,"abstract":"In the analysis of physiological time series it is important to investigate the inter-dependence structure among the observed variables of the system. For this, a number of measures of the so-called Granger causality have been developed, and among them information measures have gained much attention. However, information measures have to deal with the estimation of probability distributions of high-dimensional vector variables, typically formed through uniform delay embedding of the time series. Here, the focus is on measures derived after nonuniform embedding. Particularly, two schemes are considered, one based on conditional mutual information and the other based on conditional entropy. We evaluate the two measures on simulated nonlinear coupled dynamical systems and apply them to signals of heart rate variability, respiration, and oxygen concentration in the blood.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130855148","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
Association between baroreflex function and pressure pain threshold in women with fibromyalgia 纤维肌痛女性压力痛阈与压力反射功能的关系
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847594
Carolina Pieroni Andrade, A. R. Zámuner, M. Forti, A. Catai, P. Driusso, Ester da Silva
{"title":"Association between baroreflex function and pressure pain threshold in women with fibromyalgia","authors":"Carolina Pieroni Andrade, A. R. Zámuner, M. Forti, A. Catai, P. Driusso, Ester da Silva","doi":"10.1109/ESGCO.2014.6847594","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847594","url":null,"abstract":"The aim of this study is to evaluate the relationship between baroreflex function and pain in women with fibromyalgia syndrome (FMS). Ten women with clinical diagnosis of FMS took part in the research. The ECG and blood pressure were continuously recorded on a beat to beat basis in supine and orthostatic postures. Coherence between SAP and RR variability (K2SAP-RR) and baroreflex function (index α) were quantified. Pressure pain threshold (PPT) was determined at 18 specific tender points distributed all over the body, using a digital algometer. Correlation analysis showed positive relationship between PPT and K2SAP-RR sampled at high frequency (HF) band in the orthostatic posture (r = 0.67; p = 0.03). This result suggests that the higher is the coupling between SAP and RR series in HF band during orthostatic posture, the higher is the pressure needed to FMS participants to begin feeling pain.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115966537","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
Relationships between linear and nonlinear indexes of heart rate variability in obstructive sleep apnea syndrome 阻塞性睡眠呼吸暂停综合征患者心率变异性线性与非线性指标的关系
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847540
E. Fornasa, A. Accardo, R. Zotti, A. de Felice, G. D'addio
{"title":"Relationships between linear and nonlinear indexes of heart rate variability in obstructive sleep apnea syndrome","authors":"E. Fornasa, A. Accardo, R. Zotti, A. de Felice, G. D'addio","doi":"10.1109/ESGCO.2014.6847540","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847540","url":null,"abstract":"Heart rate variability (HRV) decrease has been described in patients with obstructive sleep apnea syndrome (OSAS). Nevertheless, time and frequency domain methods commonly used for HRV analysis are considered not completely reliable in case of respiratory and arrhythmic disorders. On the contrary, the nonlinear approach may supply powerful and promising tools to give a better insight of the autonomic control in OSAS. In this study, power-law β exponent, fractal dimension and approximate entropy parameters are calculated on the whole night recordings of 77 OSAS patients. The relationships between each pair of the parameters are quantified and discussed, also in comparison to the theoretical models.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122290102","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
Evaluation of normalised Renyi entropy for classification of cardiac autonomic neuropathy 归一化人艺熵对心脏自主神经病变分型的评价
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847489
D. Cornforth, M. Tarvainen, H. Jelinek
{"title":"Evaluation of normalised Renyi entropy for classification of cardiac autonomic neuropathy","authors":"D. Cornforth, M. Tarvainen, H. Jelinek","doi":"10.1109/ESGCO.2014.6847489","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847489","url":null,"abstract":"Early detection of cardiac autonomic neuropathy (CAN) is vital to provide timely health care. There are a variety of measures that can be considered for detection of CAN from the heart beat signal, which should provide a relatively noninvasive test. In this work we consider the use of two measures based on the RR interval - the standard deviation and the Renyi Entropy. We find that caution is indicated in the use of entropy for two reasons. First, these two measures are related, so that the researcher who provides Renyi entropy as a measure may in fact be measuring only the standard deviation. Second, there are several methods for calculating Renyi entropy, so the method needs to be carefully selected to provide meaningful results.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132656915","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
Reliable nonlinear indices for fetal heart rate variability signal analysis 可靠的非线性指标胎儿心率变异性信号分析
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847595
M. Signorini, G. Magenes
{"title":"Reliable nonlinear indices for fetal heart rate variability signal analysis","authors":"M. Signorini, G. Magenes","doi":"10.1109/ESGCO.2014.6847595","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847595","url":null,"abstract":"The paper aims to present and discuss results obtained in the analysis of Fetal Heart Rate (FHR) time series, obtained from Normal and IUGR populations of fetuses. Methods adopted considered both traditional time domain approaches as well as new indices in the nonlinear field such as entropy measures, complexity parameters and indices derived from phase rectified signal averaging method. Results shows that i) nonlinear parameters provide reliable indications about pathophysiologic fetal states; ii) could support clinical fetal monitoring by new measures; iii) should be considered to design novel fetal monitoring systems.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134104369","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
Eliminating pinned spiral waves in cardiac monolayer by far field pacing 远场起搏消除心脏单分子层内固定螺旋波
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847564
T. Shajahan, Valentin Krinski, S. Knyazeva, S. Luther
{"title":"Eliminating pinned spiral waves in cardiac monolayer by far field pacing","authors":"T. Shajahan, Valentin Krinski, S. Knyazeva, S. Luther","doi":"10.1109/ESGCO.2014.6847564","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847564","url":null,"abstract":"Fibrillation in the heart often consists of multiple spiral waves of electrical activation in cardiac tissue. To terminate these multiple waves, recently proposed Low Energy Antifibrillation Pacing (LEAP) uses a series of low energy pulses. This achieves an energy reduction of about 80% in animal experiments. To understand the mechanism of LEAP we study the interaction of electric pulses with pinned spiral waves in monolayers of cardiac cells. Optical mapping and controlled placing of heterogeneities allow us to observe the activation dynamics in these monolayers during field pulsing. We show that a pinned wave can be terminated by a series of pulses when one of the pulses falls in the vulnerable window of the pinned spiral.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134417235","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
Heart rate complexities assessed by short binary symbolic patterns 用短二进制符号模式评估心率复杂性
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847560
D. Cysarz, F. Edelhauser, P. van Leeuwen
{"title":"Heart rate complexities assessed by short binary symbolic patterns","authors":"D. Cysarz, F. Edelhauser, P. van Leeuwen","doi":"10.1109/ESGCO.2014.6847560","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847560","url":null,"abstract":"On large time scales the heart rate dynamics of healthy subjects is more complex than in patients with congestive heart failure (CHF). On a beat-to-beat basis reflecting acceleration and deceleration of heart rate the healthy heart rate dynamics can also be regular whereas CHF patients show less regularity. In this study, we investigated the impact of two pattern lengths on symbolic dynamics analysis. Holter ECGs from 30 healthy subjects and 15 CHF patients were analyzed with respect to the regularity of binary sequences of length 4 and 8. The regularity of the binary patterns was quantified using Approximate Entropy (ApEn). In essence, both pattern lengths showed similar results. Regular binary patterns were observed more often in healthy subjects whereas CHF patients showed mostly one particular regular binary pattern. Hence, even very short binary patterns can be used to assess dynamical aspects of heart rate variability.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133496863","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
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