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Performance of wrist based electrocardiography with conventional ECG analysis algorithms 基于手腕的心电图与传统心电分析算法的性能
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847494
A. Casson
{"title":"Performance of wrist based electrocardiography with conventional ECG analysis algorithms","authors":"A. Casson","doi":"10.1109/ESGCO.2014.6847494","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847494","url":null,"abstract":"Wrist worn activity monitors are becoming increasingly popular and could be greatly enhanced by the inclusion of additional physiological monitors. This paper investigates integrating wrist based electrocardiography into such devices. Results show that when no motion is present techniques and algorithms developed for traditional chest ECG can be directly re-applied to the wrist with a valid analysis present more than 90% of the time. With motion artefacts from keyboard typing this falls to 50%, still allowing significant re-use of existing approaches.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"11 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":"123164915","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
Is the time irreversibility of heart rate present even in newborns? 即使在新生儿中也存在心率的时间不可逆性吗?
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847496
B. Czippelova, L. Chladekova, Z. Uhrikova, M. Zibolen, K. Javorka, M. Javorka
{"title":"Is the time irreversibility of heart rate present even in newborns?","authors":"B. Czippelova, L. Chladekova, Z. Uhrikova, M. Zibolen, K. Javorka, M. Javorka","doi":"10.1109/ESGCO.2014.6847496","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847496","url":null,"abstract":"The aim of our research was to verify if the time irreversibility of heart rate oscillations exists even in the newborns. Multiscale irreversibility indices (Porta's index P%, Guzik index G% and Ehlers index E) of the heart rate signals were computed in 20 healthy neonates. The presence of irreversibility and its origin in system nonlinearity was assessed by surrogate data analysis. The results were compared to irreversibility analysis of young adult heart rate signals. Surrogate data analysis revealed asymmetrical nature of the series present already in the neonatal age. Moreover Porta's irreversibility index P% was significantly higher in newborns compared to adults indicating a shift in the sympatho-vagal balance in newborns towards sympathetic activity. The results of surrogate data analysis suggest an existence of the cardiovascular control system related time irreversibility in the majority of the recordings in both neonatal and adult groups.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"119 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":"123185186","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
The effects of time-varying breathing on human neurophysiological and cardiovascular mechanisms 时变呼吸对人体神经生理和心血管机制的影响
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847582
T. Stankovski, D. Eckberg, A. Stefanovska
{"title":"The effects of time-varying breathing on human neurophysiological and cardiovascular mechanisms","authors":"T. Stankovski, D. Eckberg, A. Stefanovska","doi":"10.1109/ESGCO.2014.6847582","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847582","url":null,"abstract":"We varied the timing of respiration as a means to modulate and better understand otherwise hidden human central neural and cardiovascular mechanisms. Time-frequency methods (wavelet transform, wavelet phase coherence, and directional coupling) were applied to analyze these time-varying signals. We found that respiration causally modulates both sympathetic (weakly) and vagal motoneuron (strongly) oscillations over a wide frequency range - one that extends well below the frequency of actual breaths. Breathing frequency does not affect phase coherence between diastolic pressure and muscle sympathetic oscillations, but it augments phase coherence between systolic pressure and R-R interval oscillations over a limited portion of the usual breathing frequency range.","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":"133736860","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
Fractal analysis of cardiorespiratory signals for sleep stage classification 用于睡眠阶段分类的心肺信号分形分析
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847530
P. Castiglioni, A. Faini, G. Parati, C. Lombardi
{"title":"Fractal analysis of cardiorespiratory signals for sleep stage classification","authors":"P. Castiglioni, A. Faini, G. Parati, C. Lombardi","doi":"10.1109/ESGCO.2014.6847530","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847530","url":null,"abstract":"Cardiorespiratory polygraphies do not allow the traditional sleep scoring. Therefore this study evaluated whether fractal dimension (FD) analysis of ECG and respiration (RSP) provides information on sleep stages. We considered two sleep-scored overnight full-polysomnographies. R-R intervals (RRI) from the ECG and RSP were resampled (4 Hz) and normalized to unit variance. FD of a segment of N samples of m signals is log(N-1)/[log(N-1)+log(d/L)], with L length of the trajectory in the m-dimensional space, d its extension. Monovariate (m=1, FDrri and FDrsp) and bivariate (m=2, FDrri, rsp) fractal dimensions were estimated over running windows of 15 s, and averaged over wake, lighter and deeper NREM stages, and REM. Unlike FDrri and FDrsp, the bivariate FDrri, rsp showed the same behavior in both subjects, being lowest in wake, increasing with the depth of NREM sleep and decreasing slightly in REM. This suggests that bivariate FD can provide information for sleep scoring of cardiorespiratory polygraphies.","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":"131080511","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
Blood pressure and cerebral blood flow oscillations: Friend or foe? 血压和脑血流振荡:是敌是友?
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847578
C. Rickards, Y. Tzeng
{"title":"Blood pressure and cerebral blood flow oscillations: Friend or foe?","authors":"C. Rickards, Y. Tzeng","doi":"10.1109/ESGCO.2014.6847578","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847578","url":null,"abstract":"Variability in arterial pressure and cerebral blood flow has traditionally been interpreted as a marker of cardiovascular decompensation, and has been associated with negative clinical outcomes across varying time scales, from impending orthostatic syncope to an increased risk of stroke. Emerging evidence, however, suggests that increased hemodynamic variability may, in fact, be protective in the face of acute challenges to perfusion, including significant central hypovolemia and hypotension (including hemorrhage), and during cardiac bypass surgery. We present the dichotomous views on the role of hemodynamic variability on clinical outcome, including the physiological mechanisms underlying these patterns, and the potential impact of increased and decreased variability on cerebral perfusion and oxygenation. We suggest that reconciliation of these two apparently discrepant views may lie in the time scale of hemodynamic variability; short time scale variability appears to be cerebroprotective, while mid to longer term fluctuations are associated with primary and secondary end-organ dysfunction.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"55 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":"130887831","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
Heart rate dynamics assessed by different strategies of symbolization 不同符号化策略评估心率动态
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847514
D. Cysarz, A. Porta, N. Montano, J. Kurths, N. Wessel, F. Edelhauser, P. van Leeuwen
{"title":"Heart rate dynamics assessed by different strategies of symbolization","authors":"D. Cysarz, A. Porta, N. Montano, J. Kurths, N. Wessel, F. Edelhauser, P. van Leeuwen","doi":"10.1109/ESGCO.2014.6847514","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847514","url":null,"abstract":"The analysis of symbolic dynamics applied to the RR interval series is able to retrieve information about dynamical properties. Three different strategies of symbolic transformations were investigated: (1) symbolization based on the deviation from the average, (2) symbolization based on equidistant levels between the minimum and maximum, (3) binary symbolization of the first derivative. Each method was applied to the RR interval series and its difference of 17 healthy subjects obtained during head-up tilt testing. Dynamical properties were assessed by the occurrence of short sequences (`words') of length 3. The occurrence of words was grouped according to variations of the symbols in each word (0, 1, and 2 variations). Linear regression analysis showed that the occurrence of these words reflects changes of heart rate dynamics during graded head-up tilt. Hence, very short symbolic sequences are able to track changes of the cardiac autonomic regulation.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"29 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":"127937415","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
Cardiovascular control during orthostatic and mental stress: Conditional entropy based analysis 站立和精神压力时的心血管控制:条件熵分析
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847495
M. Javorka, B. Czippelova, L. Chladekova, Z. Turianikova, Z. Visnovcova, Z. Lazarova, I. Tonhajzerova
{"title":"Cardiovascular control during orthostatic and mental stress: Conditional entropy based analysis","authors":"M. Javorka, B. Czippelova, L. Chladekova, Z. Turianikova, Z. Visnovcova, Z. Lazarova, I. Tonhajzerova","doi":"10.1109/ESGCO.2014.6847495","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847495","url":null,"abstract":"The aim of this study was to characterize the changes in cardiovascular dynamics as a result of orthostatic and mental stress and their combination by linear and information domain analysis of heart rate and blood pressure oscillations. We recorded beat-to-beat RR intervals and systolic blood pressure values in 16 volunteers during mental arithmetics task and head-up tilt test and their simultaneous administration. The analysis included spectral measures and quantification of cardiovascular signals complexity and their mutual causal coupling. Our results demonstrated that orthostatic and mental stress challenges - despite similar heart rate and blood pressure changes - evoked different effects on cardiovascular control system. The novel conditional entropy based measures were sensitive to detect differences in heart rate and blood pressure dynamics responses evoked by mental stress in different body positions.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"25 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":"125466040","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
Heart rate variability and baroreceptor reflex sensitivity in doxorubicin-induced cardiomyopathy 阿霉素诱发心肌病的心率变异性和压力感受器反射敏感性
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847548
T. Lončar-Turukalo, M. Vasić, G. Mijatović, N. Japundzic-Zigon, D. Bajić
{"title":"Heart rate variability and baroreceptor reflex sensitivity in doxorubicin-induced cardiomyopathy","authors":"T. Lončar-Turukalo, M. Vasić, G. Mijatović, N. Japundzic-Zigon, D. Bajić","doi":"10.1109/ESGCO.2014.6847548","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847548","url":null,"abstract":"The clinical use of doxorubicin, an effective chemotherapeutic is hampered by the development of irreversible cardiotoxicity. Here we test comprehensive analysis of heart rate (HR) variability (HRV) for early detection of doxorubicin-induced cardiotoxicity. Experiments were conducted in adult male Wistar rats treated for 15 days with saline (CONT) or doxorubicin (DOXO, total dose 15 mg/kg, i.p.). DOXO rats exhibited cardiotoxicity and increased mortality. Thirty five days post treatment, HR variability and baro-receptor reflex sensitivity of DOXO rats were increased in respect to CONT rats, while HR entropy was reduced. The results recommend comprehensive analysis of HRV for early detection of doxorubicin-induced cardiomyopathy.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"229 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":"126678898","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
Multiple baseline approach to predict the heart rate response to simulated diving in young adults 多基线方法预测年轻人对模拟潜水的心率反应
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847592
M. Smolinska, Krzysztof S Malinowski, S. Zajączkowski, T. Wierzba
{"title":"Multiple baseline approach to predict the heart rate response to simulated diving in young adults","authors":"M. Smolinska, Krzysztof S Malinowski, S. Zajączkowski, T. Wierzba","doi":"10.1109/ESGCO.2014.6847592","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847592","url":null,"abstract":"Subject of this study is the predictive value of baseline heart rate (HR) response to simulated diving. Twenty-seven male volunteers aged 20-25 performed apneic face immersion in cold water, while ECG was recorded. Both the initial HR increase and the following bradycardic response significantly correlated to resting HR. To optimally estimate the reference HR (mean HR or the longest 512-RR-interval-long time series or minimum of moving HR average at given lengths), we compared three different approaches, based on the best correlations between the evoked responses, HRV measures and resting baseline. Our data indicate lack of universal HR reference useful to predict resulting diving response. The longest RRi observed across preceding time window is apparently the best indicator of the diving bradycardic response, while the initial HR increase and time of voluntary apnea corresponds to the longtime HR average.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"161 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":"121183468","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
Temporal dispersion of ventricular repolarization phase and autonomic nervous system control: Clinical and experimental evidences 心室复极期时间离散度与自主神经系统控制:临床和实验证据
2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO) Pub Date : 2014-05-25 DOI: 10.1109/ESGCO.2014.6847559
G. Piccirillo, F. Moscucci, G. D’Alessandro
{"title":"Temporal dispersion of ventricular repolarization phase and autonomic nervous system control: Clinical and experimental evidences","authors":"G. Piccirillo, F. Moscucci, G. D’Alessandro","doi":"10.1109/ESGCO.2014.6847559","DOIUrl":"https://doi.org/10.1109/ESGCO.2014.6847559","url":null,"abstract":"Sudden cardiac death (SCD) is the most dreadful complication of many cardiac diseases. No study has already investigated the myocardial temporal dispersion indexes as possible tools in stratifying the overall cardiovascular mortality in patients with coronary risk factors and preserved left ventricular systolic function. Method - We retrospectively compared the short-term (5-minutes) heart rate variability (HRV), QTe variability index (QTeVI), QTp variability index QTpVI), calculated from q to T wave peak and Te variability index calculated from T wave peak to the T wave end (TeVI) in coronary risk factor deceased (n:10) or survived (n:94) patients in two years follow-up. Results - All of the QT variability indexes and the most of HRV spectral components coherence variables differed in the two subjects groups. Multivariate logistic regression analysis identified the increase of QTeVI, QTpVI, TeVI and the decrease of SDNN, lnTP, lnLF and lnHF, predicting cardiovascular mortality. Conclusions - In a population with common coronary risk factors and normal systolic function all temporal dispersion indexes and RR spectral analysis variable seem be a risk factors for cardiovascular mortality.","PeriodicalId":385389,"journal":{"name":"2014 8th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"39 6 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":"132236507","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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