Search results for " Respiratory Sinus Arrhythmia"

showing 3 items of 3 documents

Instantaneous Transfer Entropy for the Study of Cardiovascular and Cardio-Respiratory Nonstationary Dynamics

2017

Objective: Measures of transfer entropy (TE) quantify the direction and strength of coupling between two complex systems. Standard approaches assume stationarity of the observations, and therefore are unable to track time-varying changes in nonlinear information transfer with high temporal resolution. In this study, we aim to define and validate novel instantaneous measures of TE to provide an improved assessment of complex nonstationary cardiorespiratory interactions. Methods: We here propose a novel instantaneous point-process TE (ipTE) and validate its assessment as applied to cardiovascular and cardiorespiratory dynamics. In particular, heartbeat and respiratory dynamics are characteriz…

AdultMaleInformation transferHistoryHeartbeatDatabases FactualPhysiologyEntropy0206 medical engineeringComplex systemBiomedical EngineeringHeart Rate VariabilityProbability density function02 engineering and technology01 natural sciencesPoint processStatistics NonparametricElectrocardiographyYoung Adult0103 physical sciencesProbability density functionEntropy (information theory)HumansStatistical physicsTransfer Entropy010306 general physicsBiomedical measurementMathematicsbusiness.industryHemodynamicsModels CardiovascularHeart beatSignal Processing Computer-AssistedComplexityBaroreflex020601 biomedical engineeringKolmogorov-Smirnov DistanceRespiratory Sinus ArrhythmiaBaroreflex; Biomedical measurement; Complexity; Entropy; Heart beat; Heart rate variability; Heart Rate Variability; History; Kolmogorov-Smirnov Distance; Physiology; Point Process; Probability density function; Respiratory Sinus Arrhythmia; Transfer Entropy; Biomedical EngineeringDiscrete time and continuous timePoint ProceSettore ING-INF/06 - Bioingegneria Elettronica E InformaticaPoint ProcessTransfer entropyFemaleArtificial intelligencebusiness
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Model-Based Evaluation of Methods for Respiratory Sinus Arrhythmia Estimation

2021

OBJECTIVE: Respiratory sinus arrhythmia (RSA) refers to heart rate oscillations synchronous with respiration, and it is one of the major representations of cardiorespiratory coupling. Its strength has been suggested as a biomarker to monitor different conditions, and diseases. Some approaches have been proposed to quantify the RSA, but it is unclear which one performs best in specific scenarios. The main objective of this study is to compare seven state-of-the-art methods for RSA quantification using data generated with a model proposed to simulate, and control the RSA. These methods are also compared, and evaluated on a real-life application, for their ability to capture changes in cardior…

Scale (ratio)Computer scienceBiomedical EngineeringElectrocardiographyHeart RateHeart rateCoherence (signal processing)Heart rate variabilityHumansArrhythmia Sinusrespiratory sinus arrhythmiaVagal toneRespiratory systemEstimationCardiorespiratory couplingModulationbusiness.industryRespirationheart rate variabilityPattern recognitionComputational modelingCardiorespiratory coupling Computational modeling Couplings Electrocardiography Heart rate variability Modulation Respiratory Sinus ArrhythmiaSettore ING-INF/06 - Bioingegneria Elettronica E InformaticaCouplingsArtificial intelligencebusinessIEEE Transactions on Biomedical Engineering
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Information domain approach to the investigation of cardio-vascular, cardio-pulmonary, and vasculo-pulmonary causal couplings

2011

The physiological mechanisms related to cardio-vascular (CV), cardio-pulmonary (CP), and vasculo-pulmonary (VP) regulation may be probed through multivariate time series analysis tools. This study applied an information domain approach for the evaluation of non-linear causality to the beat-to-beat variability series of heart period (t), systolic arterial pressure (s), and respiration (r) measured during tilt testing and paced breathing (PB) protocols. The approach quantifies the causal coupling from the series i to the series j (C(ij)) as the amount of information flowing from i to j. A measure of directionality is also obtained as the difference between two reciprocal causal couplings (D(i…

medicine.medical_specialtySupine positioncausalityPhysiologySpeech recognitionBaroreflexlcsh:Physiologypaced breathingconditional entropyhead-up tiltInternal medicinePhysiology (medical)medicineHeart rate variabilitybaroreflexarterial pressure variabilityrespiratory sinus arrhythmiaVagal toneRespiratory systemOriginal Researchlcsh:QP1-981business.industryheart rate variabilityCardiorespiratory fitnessBlood pressureSettore ING-INF/06 - Bioingegneria Elettronica E InformaticaCardiologyBreathingArterial pressure variability; Baroreflex; Causality; Conditional entropy; Head-up tilt; Heart rate variability; Paced breathing; Respiratory sinus arrhythmia; Physiology; Physiology (medical)business
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