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A simple model for 1/f spectra in heart rate variability.

Research output: Contribution in Book/Report/ProceedingsChapter

Published

  • James P. Gleeson
  • Aneta Stefanovska
Publication date2007
Host publicationPROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE)
EditorsS. M. Bezrukov
Place of publicationBellingham, Washington, USA
PublisherSPIE-INT SOC OPTICAL ENGINEERING
Number of pages9
Volume6602
Edition084101
ISBN (Print)978-0-8194-6739-3
Original languageEnglish

Publication series

NamePROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE)
PublisherSPIE-INT SOC OPTICAL ENGINEERING

Abstract

Heart rate variability (HRV) measures cycle-to-cycle correlations in the instantaneous oscillation period of the heart. In this paper it is shown that a simple model process, consisting of a sum of uncoupled sinusoidal oscillators with slightly different frequencies, has a HRV spectrum with a 1/f scaling over a range of frequencies. This implies that the appearance of 1/f HRV spectra in experiments should not be considered evidence of oscillator coupling or other more complex dynamics. The origin of the 1/f scaling in the model is examined analytically, and its dependence upon the sampling of low-amplitude fluctuations of the process is highlighted.

Bibliographic note

NOISE AND FLUCTUATIONS IN BIOLOGICAL, BIOPHYSICAL, AND BIOMEDICAL SYSTEMS