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Items for "approximate entropy"

Characterization of Heart Rate Variability Changes Following Asphyxia in Rats

OBJECTIVES: A non-invasive method to monitor the functioning of the autonomous nervous system consists in heart rate variability (HRV) analysis...

Keywords: Heart rate variability, autonomous nervous system, linear and nonlinear analysis, approximate entropy

01/2004 | Methods of Information in Medicine, Schattauer

Increase in regularity of fetal heart rate variability with age

It is generally assumed that fetal heart rate variability increases with gestation, reflecting prenatal development of the autonomic nervous system...

Keywords: approximate entropy, prenatal development, symbolic dynamics

10/2006 | Biomedizinische Technik, Walter de Gruyter

Heart rate variability in the fetus: a comparison of measures

Background: In fetal surveillance, fetal heart rate changes are assessed using cardiotocography (CTG)...

Keywords: approximate entropy, complexity, correlation analysis, fetal magnetocardiography, frequency domain, time domain

02/2007 | Biomedizinische Technik, Walter de Gruyter

Chaotic indices and canonical ensemble of heart rate patterns in small-for-gestational age fetuses

Aims: We studied how linear and nonlinear heart rate dynamics differ between normal fetuses (n=135) and uncomplicated small-for-gestational age (SGA) fetuses (n=65), aged 32–40 weeks' gestation.

Methods: We analyzed each fetal heart rate time series for 20 min...

Keywords: approximate entropy, canonical correlation analysis, chaotic dynamics, correlation dimension, small-for-gestational age

06/2007 | Journal of Perinatal Medicine, Walter de Gruyter

EEG parameters and their combination as indicators of depth of anaesthesia

EEG parameters for assessment of depth of anaesthesia are typically based on different signal processing methods, such as spectral and complexity analysis...

Keywords: Anästhesie, approximate Entropie, EEG, Fuzzy-Logik, Lempel-Ziv-Komplexität, qWSMF, WSMF

07/2006 | Biomedizinische Technik, Walter de Gruyter