Multifractality in human heartbeat dynamics

Plamen Ch. Ivanov (), Luís A. Nunes Amaral, Ary L. Goldberger, Shlomo Havlin, Michael G. Rosenblum, Zbigniew R. Struzik and H. Eugene Stanley
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Plamen Ch. Ivanov: Boston University
Luís A. Nunes Amaral: Boston University
Ary L. Goldberger: Harvard Medical School, Beth Israel Deaconess Medical Center
Shlomo Havlin: Bar-Ilan University
Michael G. Rosenblum: Potsdam University
Zbigniew R. Struzik: Centre for Mathematical and Computing Science
H. Eugene Stanley: Boston University

Nature, 1999, vol. 399, issue 6735, 461-465

Abstract: Abstract There is evidence that physiological signals under healthy conditions may have a fractal temporal structure1. Here we investigate the possibility that time series generated by certain physiological control systems may be members of a special class of complex processes, termed multifractal, which require a large number of exponents to characterize their scaling properties2,3,4,5,6. We report onevidence for multifractality in a biological dynamical system, the healthy human heartbeat, and show that the multifractal character and nonlinear properties of the healthy heart rate are encoded in the Fourier phases. We uncover a loss of multifractality for a life-threatening condition, congestive heart failure.

Date: 1999
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DOI: 10.1038/20924

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