0000000000670492

AUTHOR

Stefano Guzzetti

showing 3 related works from this author

An integrated approach based on uniform quantization for the evaluation of complexity of short-term heart period variability: Application to 24 h Hol…

2007

We propose an integrated approach based on uniform quantization over a small number of levels for the evaluation and characterization of complexity of a process. This approach integrates information-domain analysis based on entropy rate, local nonlinear prediction, and pattern classification based on symbolic analysis. Normalized and non-normalized indexes quantifying complexity over short data sequences (∼300 samples) are derived. This approach provides a rule for deciding the optimal length of the patterns that may be worth considering and some suggestions about possible strategies to group patterns into a smaller number of families. The approach is applied to 24 h Holter recordings of …

Cardiac outputDaytimeCardiac Output LowGeneral Physics and AstronomyRisk AssessmentSensitivity and SpecificityPhysics and Astronomy (all)Heart RateReference ValuesRisk FactorsOscillometryStatisticsHeart ratemedicineMathematical PhysicHumansCircadian rhythmDiagnosis Computer-AssistedMathematical PhysicsEntropy rateMathematicsmedicine.diagnostic_testApplied MathematicsReproducibility of ResultsStatistical and Nonlinear PhysicsSignal Processing Computer-AssistedIntegrated approachmedicine.diseasePrognosisSystems IntegrationHeart failureElectrocardiography AmbulatoryAlgorithmElectrocardiographyAlgorithmsStatistical and Nonlinear PhysicChaos (Woodbury, N.Y.)
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Quantifying Net Synergy/Redundancy of Spontaneous Variability Regulation via Predictability and Transfer Entropy Decomposition Frameworks.

2017

Objective: Indexes assessing the balance between redundancy and synergy were hypothesized to be helpful in characterizing cardiovascular control from spontaneous beat-to-beat variations of heart period (HP), systolic arterial pressure (SAP), and respiration (R). Methods: Net redundancy/synergy indexes were derived according to predictability and transfer entropy decomposition strategies via a multivariate linear regression approach. Indexes were tested in two protocols inducing modifications of the cardiovascular regulation via baroreflex loading/unloading (i.e., head-down tilt at −25° and graded head-up tilt at 15°, 30°, 45°, 60°, 75°, and 90°, respectively). The net redundancy/synergy of …

AdultMaleMultivariate statisticsComputer scienceEntropyBiomedical EngineeringBlood Pressurecomputer.software_genreAutonomic Nervous System01 natural sciences010305 fluids & plasmasHead-Down TiltEntropy (classical thermodynamics)ElectrocardiographyYoung AdultHeart RateBayesian multivariate linear regression0103 physical sciencesStatisticshead-down tilt (HDT)Redundancy (engineering)Entropy (information theory)HumansPredictabilityEntropy (energy dispersal)010306 general physicsEntropy (arrow of time)cardiovascular controlModels StatisticalEntropy (statistical thermodynamics)heart rate variabilityUnivariateSignal Processing Computer-AssistedBaroreflexMiddle Agedhead-up tilt (HUT)Settore ING-INF/06 - Bioingegneria Elettronica E InformaticaTransfer entropyFemaleData miningWiener-Granger causalitycomputerEntropy (order and disorder)IEEE transactions on bio-medical engineering
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Biomarkers for diagnosing sepsis in the emergency department: A consensus document by SIBioC-Medicina di Laboratorio and the Academy of Emergency Med…

2018

This article is drafted as a consensus document involving eight members of the Italian Society of Clinical Biochemistry and Laboratory Medicine (SIBioC) and eight members of the Academy of Emergency Medicine and Care (AcEMC), to whom a questionnaire was submitted for obtaining opinions on some recommendations about the use of biomarkers for diagnosing sepsis and managing antibiotic therapy in the emergency department. These recommendations were drafted following the National Guidelines Program (PNLG). According to the cumulative consent, three "A" recommendations (strongly recommended indication) emerged, which include biomarker availability (always available on prescription), clinical use …

Medical Laboratory TechnologySettore BIO/12 - Biochimica Clinica E Biologia Molecolare ClinicaClinical BiochemistryBiochemistry (medical)
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