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

James P. Gleeson; Aneta Stefanovska

doi:10.1117/12.725558

15 June 2007 A simple model for 1/f spectra in heart rate variability

James P. Gleeson, Aneta Stefanovska

Proceedings Volume 6602, Noise and Fluctuations in Biological, Biophysical, and Biomedical Systems; 66020Z (2007) https://doi.org/10.1117/12.725558
Event: SPIE Fourth International Symposium on Fluctuations and Noise, 2007, Florence, Italy

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.

Citation Download Citation

James P. Gleeson and Aneta Stefanovska "A simple model for 1/f spectra in heart rate variability", Proc. SPIE 6602, Noise and Fluctuations in Biological, Biophysical, and Biomedical Systems, 66020Z (15 June 2007); https://doi.org/10.1117/12.725558

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