Search results for "Cardiovascular variability"

showing 3 items of 13 documents

Feasibility of Ultra-Short-Term Analysis of Heart Rate and Systolic Arterial Pressure Variability at Rest and during Stress via Time-Domain and Entro…

2022

Heart Rate Variability (HRV) and Blood Pressure Variability (BPV) are widely employed tools for characterizing the complex behavior of cardiovascular dynamics. Usually, HRV and BPV analyses are carried out through short-term (ST) measurements, which exploit ~five-minute-long recordings. Recent research efforts are focused on reducing the time series length, assessing whether and to what extent Ultra-Short-Term (UST) analysis is capable of extracting information about cardiovascular variability from very short recordings. In this work, we compare ST and UST measures computed on electrocardiographic R-R intervals and systolic arterial pressure time series obtained at rest and during both post…

electrocardiography (ECG)Short-Term (ST) cardiovascular variabilityBlood PressureHeart Rate Variability (HRV)Settore ING-INF/01 - ElettronicaBiochemistryAtomic and Molecular Physics and OpticsHeart Rate Variability (HRV); Short-Term (ST) cardiovascular variability; Ultra-Short-Term (UST) HRV; electrocardiography (ECG); Systolic Arterial Pressure (SAP); entropy; conditional entropy; complexity; time-series analysisUltra-Short- Term (UST) HRVAnalytical Chemistryconditional entropyElectrocardiographyHeart RateSettore ING-INF/06 - Bioingegneria Elettronica E Informaticatime-series analysisArterial PressureElectrical and Electronic EngineeringentropycomplexitySystolic Arterial Pressure (SAP)InstrumentationSensors; Volume 22; Issue 23; Pages: 9149
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Compensated transfer entropy as a tool for reliably estimating information transfer in physiological time series

2013

We present a framework for the estimation of transfer entropy (TE) under the conditions typical of physiological system analysis, featuring short multivariate time series and the presence of instantaneous causality (IC). The framework is based on recognizing that TE can be interpreted as the difference between two conditional entropy (CE) terms, and builds on an efficient CE estimator that compensates for the bias occurring for high dimensional conditioning vectors and follows a sequential embedding procedure whereby the conditioning vectors are formed progressively according to a criterion for CE minimization. The issue of IC is faced accounting for zero-lag interactions according to two a…

magnetoencephalographyInformation transferinstantaneous causalityGeneral Physics and Astronomylcsh:AstrophysicsMachine learningcomputer.software_genreconditional entropyPhysics and Astronomy (all)lcsh:QB460-466False positive paradoxSensitivity (control systems)lcsh:ScienceMathematicsConditional entropytime delay embeddingSeries (mathematics)business.industryEstimatorlcsh:QC1-999Cardiovascular variability; Conditional entropy; Instantaneous causality; Magnetoencephalography; Time delay embedding; Physics and Astronomy (all)Settore ING-INF/06 - Bioingegneria Elettronica E InformaticaTransfer entropylcsh:QArtificial intelligenceMinificationcardiovascular variabilitycardiovascular variability; conditional entropy; instantaneous causality; magnetoencephalography; time delay embeddingbusinesscomputerAlgorithmlcsh:Physics
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Multiscale Information Decomposition Dissects Control Mechanisms of Heart Rate Variability at Rest and During Physiological Stress.

2019

Heart rate variability (HRV

medicine.medical_specialtyTechnology and Engineering0206 medical engineeringRR intervalRESPIRATORY SINUS ARRHYTHMIAPERIODGeneral Physics and Astronomysynergylcsh:Astrophysics02 engineering and technologyBiologyBaroreflexArticle03 medical and health sciences0302 clinical medicinestomatognathic systemInternal medicinelcsh:QB460-466RespirationMedicine and Health Sciencesmedicineotorhinolaryngologic diseasesHeart rate variabilitycardiovascular diseasesVagal tonelcsh:SciencePhysiological stressinformation theoryBAROREFLEXredundancyheart rate variabilityvirus diseasesmultiscale analysisEntropy cardiovascular variability redundancy autonomic nervous system020601 biomedical engineeringlcsh:QC1-999ARTERIAL-PRESSUREAutonomic nervous systemBlood pressuretime series analysisCardiologyinformation decompositionlcsh:QentropyCARDIOPULMONARYlcsh:Physics030217 neurology & neurosurgerycirculatory and respiratory physiologyEntropy (Basel, Switzerland)
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