Search results for: approximate entropy

• Entropy Measures of heart rate variability for short ECG datasets in patients with congestive heart failure

  Publication

  • B. Graff
  • A. Kaczkowska
  • G. Graff

  - Acta Physica Polonica B Proceedings Supplement - Year 2012

  We investigated the usefulness of entropy measures calculated for short ECG series in distinguishing healthy subjects from patients with congestive heart failure (CHF). Four entropy measures were tested: Approximate Entropy (ApEn), Sample Entropy (SampEn), Fuzzy Entropy (Fuzzy En) and Permutation Entropy (PE), each computed for ECG series of 1000, 500, 250 and 100 RR intervals. We found that with a reduction of the data set length...

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• Entropy measures of heart rate variability for short ECG datasets in patients with congestive heart failure

  Publication

  • B. Graff
  • G. Graff
  • A. Kaczkowska

  - Acta Physica Polonica B Proceedings Supplement - Year 2012

  We investigated the usefulness of entropy measures calculated for short ECG series in distinguishing healthy subjects from patients with congestive heart failure (CHF). Four entropy measures were tested: Approximate Entropy (ApEn), Sample Entropy (SampEn), Fuzzy Entropy (FuzzyEn) and Permutation Entropy (PE), each computed for ECG series of 1000, 500, 250 and 100 RR intervals. We found that with a reduction of the data set length...

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• Entropia w badaniach zaburzeń rytmu serca

  Publication

  • B. Graff
  • G. Graff
  • A. Kolesiak

  - Year 2008

  Artykuł prezentuje zastosowanie ''Approximate Entropy'', będącej miarą stopnia złożoności szeregów czasowych, do analizy zmiennosci rytmu serca.

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• Chronographic Imprint of Age-Induced Alterations in Heart Rate Dynamical Organization

  Publication

  • D. Makowiec
  • D. Wejer
  • A. Kaczkowska
  • M. Żarczyńska-Buchowiecka
  • Z. R. Struzik

  - Frontiers in Physiology - Year 2015

  Beat-to-beat changes in the heart period are transformed into a network of increments between subsequent RR-intervals, which enables graphical descriptions of short-term heart period variability. Three types of such descriptions are considered: (1) network graphs arising from a set of vertices and directed edges, (2) contour plots of adjacency matrices A, representing the networks and transition matrices T, resulting from A, and (3)...

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• Temporal Changes in Complexity of Cardiovascular Regulation during Head-Up Tilt Test by Entropic Measures of Fluctuations of Heart Period Intervals and Systolic Blood Pressure

  Publication

  • D. Wejer
  • A. Kaczkowska
  • D. Makowiec
  • Z. R. Struzik
  • B. Graff
  • G. Graff
  • S. Budrejko
  • D. Kozłowski
  • K. Narkiewicz

  - Year 2014

  Temporal changes in complexity of cardiovascular regulation during head-up tilt test by entropic measures of fluctuations of heart period intervals and systolic blood pressure

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