Pub Date : 2022-10-09DOI: 10.1109/ESGCO55423.2022.9931381
D. Cysarz, F. Edelhäuser
Relevant properties of heart period dynamics can be analyzed by methods derived from symbolic dynamics. However, a lot of information is lost especially if the RR tachogram is transformed to a binary representation. Here, we aim to complement measures of binary symbolic dynamics by properties closely related to the binary representation, i.e. runs of accelerations and decelerations of heart period as basic characteristics underlying heart rate variability. This approach is applied to 1079 RR tachograms from healthy subjects covering the entire adulthood (age range: 18 to 84 years). Each parameter was analyzed per age decade. The average RR interval increased at old age compared to the youngest age group (median RR interval 839 ms vs. 970 ms). SDNN was constant up to 39 years and declined for older subjects (56 ms vs. 36 ms). Binary symbolic indices were derived from acceleration and deceleration of heart period. P1V, i.e. binary patterns of length 3 with one variation, decreased for elderly (>70 years, 53,4%) compared to young ages (<29 years, 66,3%). At the same time P2V, i.e. binary patterns with two variations, increased (14,7% vs. 22,7%). The cumulative accelerations and decelerations were largest for youngest subjects and decreased subsequently and was low in the age group 40 to 49 years (accelerations: −73 ms vs. −37 ms, decelerations. 64 ms vs. 34 ms). The analysis of runs of accelerations and decelerations provides information complementing results from binary symbolic dynamics.
心脏周期动力学的相关性质可以用符号动力学的方法来分析。但是，如果将RR行车图转换为二进制表示，则会丢失大量信息。在这里，我们的目标是通过与二进制表示密切相关的特性来补充二进制符号动力学的测量，即心跳周期的加速和减速作为心率变异性的基本特征。该方法应用于1079个健康受试者的RR行车图，涵盖整个成年期(年龄范围:18至84岁)。每个参数按年龄10年进行分析。与最年轻的年龄组相比，老年组的平均RR间隔增加(中位RR间隔839 ms对970 ms)。SDNN持续到39岁，在老年受试者中下降(56 ms vs 36 ms)。由心跳周期的加速和减速推导出二进制符号指标。P1V，即长度为3且有一个变异的二元模式，老年人(>70岁)比年轻人(<29岁，66.3%)降低了53,4%。与此同时，P2V，即具有两种变化的二进制模式，增加了(14.7%对22.7%)。累积加速和减速在最年轻的受试者中最大，随后下降，在40至49岁的年龄组中较低(加速:−73 ms vs.−37 ms，减速)。64毫秒vs. 34毫秒)。对加速和减速运行的分析提供了二进制符号动力学结果的信息补充。
{"title":"Complementing binary symbolic indices of heart period dynamics by acceleration and deceleration runs","authors":"D. Cysarz, F. Edelhäuser","doi":"10.1109/ESGCO55423.2022.9931381","DOIUrl":"https://doi.org/10.1109/ESGCO55423.2022.9931381","url":null,"abstract":"Relevant properties of heart period dynamics can be analyzed by methods derived from symbolic dynamics. However, a lot of information is lost especially if the RR tachogram is transformed to a binary representation. Here, we aim to complement measures of binary symbolic dynamics by properties closely related to the binary representation, i.e. runs of accelerations and decelerations of heart period as basic characteristics underlying heart rate variability. This approach is applied to 1079 RR tachograms from healthy subjects covering the entire adulthood (age range: 18 to 84 years). Each parameter was analyzed per age decade. The average RR interval increased at old age compared to the youngest age group (median RR interval 839 ms vs. 970 ms). SDNN was constant up to 39 years and declined for older subjects (56 ms vs. 36 ms). Binary symbolic indices were derived from acceleration and deceleration of heart period. P1V, i.e. binary patterns of length 3 with one variation, decreased for elderly (>70 years, 53,4%) compared to young ages (<29 years, 66,3%). At the same time P2V, i.e. binary patterns with two variations, increased (14,7% vs. 22,7%). The cumulative accelerations and decelerations were largest for youngest subjects and decreased subsequently and was low in the age group 40 to 49 years (accelerations: −73 ms vs. −37 ms, decelerations. 64 ms vs. 34 ms). The analysis of runs of accelerations and decelerations provides information complementing results from binary symbolic dynamics.","PeriodicalId":199691,"journal":{"name":"2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124641799","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}
Pub Date : 2022-10-09DOI: 10.1109/ESGCO55423.2022.9931353
D. Makowiec, Joanna Wdowczyk, M. Gruchała
Heart rate variability (HRV) observed in con-secutive windows of nocturnal Holter recordings, is used to assess the development of left ventricular hypertrophy (LVH) in heart transplant (HTX) patients. Based on the relations between variability of HRV metrics estimated in windows, one can discern the appearance of LVH and also qualify the development of LVH. In particular, the graft with concentric geometry can be distinguished from the hypertrophic state. Clinical Relevance-LVH affects HRV in HTX patients in a way that can assist in the non-invasive quantification of the development of the hypertrophy
{"title":"Variability of heart rate variability indexes for estimates of left ventricular hypertrophy in subjects shortly after a heart transplant*","authors":"D. Makowiec, Joanna Wdowczyk, M. Gruchała","doi":"10.1109/ESGCO55423.2022.9931353","DOIUrl":"https://doi.org/10.1109/ESGCO55423.2022.9931353","url":null,"abstract":"Heart rate variability (HRV) observed in con-secutive windows of nocturnal Holter recordings, is used to assess the development of left ventricular hypertrophy (LVH) in heart transplant (HTX) patients. Based on the relations between variability of HRV metrics estimated in windows, one can discern the appearance of LVH and also qualify the development of LVH. In particular, the graft with concentric geometry can be distinguished from the hypertrophic state. Clinical Relevance-LVH affects HRV in HTX patients in a way that can assist in the non-invasive quantification of the development of the hypertrophy","PeriodicalId":199691,"journal":{"name":"2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128570372","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}
Pub Date : 2022-10-09DOI: 10.1109/ESGCO55423.2022.9931387
Zoran Matić, Aleksandar Kalauzi, Mirjana M. Platiša, T. Bojić
Background. It has become common in research with detrended fluctuation analysis (DFA) to use slopes of regression lines (α1 and α2) and their ratio as measures of fractal properties of dynamical processes such as physiological rhythm fluctuations. In this study, instead of the ratio (α1/α2) in DFA of ECG RR intervals and respiratory signals, we propose the use of a new measure: the inter-fractal angle (θ) - angle that DFA regression lines form between each other. Methods. Angle θ was obtained by means of graphical-analytical calculation. Using one way-Anova test, sensitivity of θ on the influence of slow breathing and orthostasis was compared in respect to ratio α1/α2. Results. Comparisons revealed that changes of (θ) were statistically more significant than changes of αl/α2. Conclusion. Inter-fractal angle is an elegant new measure of DFA that is more sensitive to perturbations such as changes in body posture and breathing regime than α1/α2.
{"title":"Sensitivity Estimations in Favor of Using Inter-fractal Angle in Detrended Fluctuation Analysis","authors":"Zoran Matić, Aleksandar Kalauzi, Mirjana M. Platiša, T. Bojić","doi":"10.1109/ESGCO55423.2022.9931387","DOIUrl":"https://doi.org/10.1109/ESGCO55423.2022.9931387","url":null,"abstract":"Background. It has become common in research with detrended fluctuation analysis (DFA) to use slopes of regression lines (α1 and α2) and their ratio as measures of fractal properties of dynamical processes such as physiological rhythm fluctuations. In this study, instead of the ratio (α1/α2) in DFA of ECG RR intervals and respiratory signals, we propose the use of a new measure: the inter-fractal angle (θ) - angle that DFA regression lines form between each other. Methods. Angle θ was obtained by means of graphical-analytical calculation. Using one way-Anova test, sensitivity of θ on the influence of slow breathing and orthostasis was compared in respect to ratio α1/α2. Results. Comparisons revealed that changes of (θ) were statistically more significant than changes of αl/α2. Conclusion. Inter-fractal angle is an elegant new measure of DFA that is more sensitive to perturbations such as changes in body posture and breathing regime than α1/α2.","PeriodicalId":199691,"journal":{"name":"2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114606376","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}
Pub Date : 2022-10-09DOI: 10.1109/ESGCO55423.2022.9931380
Cosimo Aliani, Eva Rossi, Piergiorgio Francia, Marco U. Luchini, I. Calamai, R. Deodati, Rosario Spina, A. Lanatà, L. Bocchi
The aim of this study was to investigate possible alterations in the relationship between peripheral and central circulation dynamics caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection. Clinical Relevance-Results show how coronavirus disease 2019 can affect the energy of the Low Frequency band [0.04-0.15]Hz of the plethysmographic signal
{"title":"Alterations of oscillatory relationships of plethysmographic signal in patients with COVID-19","authors":"Cosimo Aliani, Eva Rossi, Piergiorgio Francia, Marco U. Luchini, I. Calamai, R. Deodati, Rosario Spina, A. Lanatà, L. Bocchi","doi":"10.1109/ESGCO55423.2022.9931380","DOIUrl":"https://doi.org/10.1109/ESGCO55423.2022.9931380","url":null,"abstract":"The aim of this study was to investigate possible alterations in the relationship between peripheral and central circulation dynamics caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection. Clinical Relevance-Results show how coronavirus disease 2019 can affect the energy of the Low Frequency band [0.04-0.15]Hz of the plethysmographic signal","PeriodicalId":199691,"journal":{"name":"2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124715605","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}
Pub Date : 2022-10-09DOI: 10.1109/ESGCO55423.2022.9931358
G. Baselli, Federica Fasani, L. Pelizzari, M. Cazzoli, F. Baglio, M. M. Laganá
Real-time, phase-contrast MRI (RT-PC-MRI) provides a quantitative evaluation of flow signals. Focusing the high cervical level, the fluid interchange of the intracranial compartment can thus be monitored. In the present study we address the beat-to-beat variability of the arterial, venous, and liquor flows in 30 healthy volunteers. Also, the median beats in the inspiratory and expiratory phases are derived, considering three respiratory conditions: free, paced, and deep. These results, though preliminary, clearly demonstrate the utility of this new technique.
{"title":"Real Time Phase Contrast MRI and Cerebrovascular Beat-to-Beat Variability Changes with Respiration Mode","authors":"G. Baselli, Federica Fasani, L. Pelizzari, M. Cazzoli, F. Baglio, M. M. Laganá","doi":"10.1109/ESGCO55423.2022.9931358","DOIUrl":"https://doi.org/10.1109/ESGCO55423.2022.9931358","url":null,"abstract":"Real-time, phase-contrast MRI (RT-PC-MRI) provides a quantitative evaluation of flow signals. Focusing the high cervical level, the fluid interchange of the intracranial compartment can thus be monitored. In the present study we address the beat-to-beat variability of the arterial, venous, and liquor flows in 30 healthy volunteers. Also, the median beats in the inspiratory and expiratory phases are derived, considering three respiratory conditions: free, paced, and deep. These results, though preliminary, clearly demonstrate the utility of this new technique.","PeriodicalId":199691,"journal":{"name":"2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132882619","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}
Pub Date : 2022-10-09DOI: 10.1109/ESGCO55423.2022.9931378
Katarzyna B. Kubiak, B. Więckowska, T. Krauze, J. Piskorski, P. Guzik
Using two Poincare plots to analyze concordant systolic blood pressure (SBP) and RR interval changes, we have developed a novel method for quantifying baroreflex function (the ppBR method). The ppBR method quantifies the short-(BRS1), long-term (BRS2), and total baroreflex sensitivity (BRST), and baroreflex effectiveness (BRE) for increasing (uu) and decreasing (dd) values of SBP and RR intervals. The ppBR also explores the asymmetrical features of the baroreflex separately for uu and dd SBP-RR intervals interactions. The 30-minute resting beat-to-beat recordings of SBP and RR intervals from ECG from 156 healthy young adults were cut into thirty 1-minute windows. The ppBR method demonstrated asymmetrical features of BRS1 and BRE, and found that BRS2 and BRST gradually increased with the duration of the supine rest. The ppBR method visualizes subtle changes in the relationship between SBP and RR intervals caused by the cardiovascular adaptation to the rest in the supine position.
{"title":"Detection of the baroreflex function changes during the 30-minute supine rest by the Poincaré plot-based method","authors":"Katarzyna B. Kubiak, B. Więckowska, T. Krauze, J. Piskorski, P. Guzik","doi":"10.1109/ESGCO55423.2022.9931378","DOIUrl":"https://doi.org/10.1109/ESGCO55423.2022.9931378","url":null,"abstract":"Using two Poincare plots to analyze concordant systolic blood pressure (SBP) and RR interval changes, we have developed a novel method for quantifying baroreflex function (the ppBR method). The ppBR method quantifies the short-(BRS1), long-term (BRS2), and total baroreflex sensitivity (BRST), and baroreflex effectiveness (BRE) for increasing (uu) and decreasing (dd) values of SBP and RR intervals. The ppBR also explores the asymmetrical features of the baroreflex separately for uu and dd SBP-RR intervals interactions. The 30-minute resting beat-to-beat recordings of SBP and RR intervals from ECG from 156 healthy young adults were cut into thirty 1-minute windows. The ppBR method demonstrated asymmetrical features of BRS1 and BRE, and found that BRS2 and BRST gradually increased with the duration of the supine rest. The ppBR method visualizes subtle changes in the relationship between SBP and RR intervals caused by the cardiovascular adaptation to the rest in the supine position.","PeriodicalId":199691,"journal":{"name":"2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130572562","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}
Pub Date : 2022-10-09DOI: 10.1109/ESGCO55423.2022.9931384
J. Krohova, B. Czippelova, Z. Turianikova, M. Kuricová, D. Černochová, L. Faes, M. Javorka
Considering the potential involvement of the impaired baroreflex function in the pathogenesis of blood pressure dysregulation, including hypertension, this study was aimed to investigate potential changes in two arms of baroreflex control in young normotensive obese patients. Decreases in both arms reflecting impairment of baroreflex function and decreased response of baroreflex related measures to passive orthostasis were observed. We conclude that for better characterization of baroreflex function, not only heart rate as a target of its control should be considered. We suggest that baroreflex impairment affecting both heart rate and vasomotion regulation could be one of the factors contributing to the future development of hypertension in this high-risk associated group.
{"title":"Cardiac chronotropic and vascular resistance arms of baroreflex in obesity","authors":"J. Krohova, B. Czippelova, Z. Turianikova, M. Kuricová, D. Černochová, L. Faes, M. Javorka","doi":"10.1109/ESGCO55423.2022.9931384","DOIUrl":"https://doi.org/10.1109/ESGCO55423.2022.9931384","url":null,"abstract":"Considering the potential involvement of the impaired baroreflex function in the pathogenesis of blood pressure dysregulation, including hypertension, this study was aimed to investigate potential changes in two arms of baroreflex control in young normotensive obese patients. Decreases in both arms reflecting impairment of baroreflex function and decreased response of baroreflex related measures to passive orthostasis were observed. We conclude that for better characterization of baroreflex function, not only heart rate as a target of its control should be considered. We suggest that baroreflex impairment affecting both heart rate and vasomotion regulation could be one of the factors contributing to the future development of hypertension in this high-risk associated group.","PeriodicalId":199691,"journal":{"name":"2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"94 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126052085","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}
Pub Date : 2022-10-09DOI: 10.1109/ESGCO55423.2022.9931391
G. Mijatović, Chiara Barà, T. Lončar-Turukalo, L. Faes
We present an approach to quantify the predictive capacity of point processes analyzed in continuous time. An index of the so-called memory utilization rate (MUR) is defined as a model-free measure of the amount of predictive information stored in a point process. A strategy for the data-efficient, model-free estimation of MUR is proposed and validated in simulations of independent and history-dependent heartbeat intervals. Our results document the ability of the proposed MUR estimator to detect the absence and quantify the extent of predictable information in heart rate variability signals.
{"title":"A method to Quantify Memory Utilization of Heartbeat Dynamics in Continuous Time","authors":"G. Mijatović, Chiara Barà, T. Lončar-Turukalo, L. Faes","doi":"10.1109/ESGCO55423.2022.9931391","DOIUrl":"https://doi.org/10.1109/ESGCO55423.2022.9931391","url":null,"abstract":"We present an approach to quantify the predictive capacity of point processes analyzed in continuous time. An index of the so-called memory utilization rate (MUR) is defined as a model-free measure of the amount of predictive information stored in a point process. A strategy for the data-efficient, model-free estimation of MUR is proposed and validated in simulations of independent and history-dependent heartbeat intervals. Our results document the ability of the proposed MUR estimator to detect the absence and quantify the extent of predictable information in heart rate variability signals.","PeriodicalId":199691,"journal":{"name":"2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129809617","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}
Pub Date : 2022-10-09DOI: 10.1109/ESGCO55423.2022.9931382
T. Bojić, Zoran Matić, Mirjana M. Platiša, Aleksandar Kalauzi
We explored influence of slow breathing and orthostasis on angular indices that correspond to slopes of regression lines of detrended fluctuation analysis (DFA) of RR intervals and respiration signal. The tool for our exploration was probability density estimation (PDE). By applying it, we got insights about body posture and breathing regime induced group behavioral patterns of these DFA angles and that these patterns have certain physiological meaning. Mainly, obtained PDE patterns (unimodality, bimodality etc) reflect ergo/tropho-tropic character of sympathetic and parasympathetic adaptive modulation with respect to changes of physical and physiological conditions of diverse physiological states.
{"title":"Fractal angle modality patterns in RRI and respiration signal of healthy subjects responding to orthostasis and slow breathing","authors":"T. Bojić, Zoran Matić, Mirjana M. Platiša, Aleksandar Kalauzi","doi":"10.1109/ESGCO55423.2022.9931382","DOIUrl":"https://doi.org/10.1109/ESGCO55423.2022.9931382","url":null,"abstract":"We explored influence of slow breathing and orthostasis on angular indices that correspond to slopes of regression lines of detrended fluctuation analysis (DFA) of RR intervals and respiration signal. The tool for our exploration was probability density estimation (PDE). By applying it, we got insights about body posture and breathing regime induced group behavioral patterns of these DFA angles and that these patterns have certain physiological meaning. Mainly, obtained PDE patterns (unimodality, bimodality etc) reflect ergo/tropho-tropic character of sympathetic and parasympathetic adaptive modulation with respect to changes of physical and physiological conditions of diverse physiological states.","PeriodicalId":199691,"journal":{"name":"2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130412935","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}
Pub Date : 2022-10-09DOI: 10.1109/ESGCO55423.2022.9931388
G. Volpes, Chiara Barà, Simone Valenti, M. Javorka, A. Busacca, L. Faes, R. Pernice
In this work, we study ultra-short term (UST) complexity of Heart Rate Variability (HRV) and its agreement with analysis of standard short-term (ST) HRV recordings obtained at rest and during orthostatic stress. Conditional Entropy (CE) measures have been computed using both a linear Gaussian approximation and a more accurate model-free approach based on nearest neighbors. The agreement between UST and ST indices has been compared via statistical tests and correlation analysis, suggesting the feasibility of exploiting faster algorithms and shorter time series for detecting changes in cardiovascular control during various states.
{"title":"Feasibility of Ultra-short Term Complexity Analysis of Heart Rate Variability in Resting State and During Orthostatic Stress","authors":"G. Volpes, Chiara Barà, Simone Valenti, M. Javorka, A. Busacca, L. Faes, R. Pernice","doi":"10.1109/ESGCO55423.2022.9931388","DOIUrl":"https://doi.org/10.1109/ESGCO55423.2022.9931388","url":null,"abstract":"In this work, we study ultra-short term (UST) complexity of Heart Rate Variability (HRV) and its agreement with analysis of standard short-term (ST) HRV recordings obtained at rest and during orthostatic stress. Conditional Entropy (CE) measures have been computed using both a linear Gaussian approximation and a more accurate model-free approach based on nearest neighbors. The agreement between UST and ST indices has been compared via statistical tests and correlation analysis, suggesting the feasibility of exploiting faster algorithms and shorter time series for detecting changes in cardiovascular control during various states.","PeriodicalId":199691,"journal":{"name":"2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121120439","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}
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