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Multifractality in Human Heartbeat Dynamics

Plamen Ch. Ivanov·Luís A. Nunes Amaral·Ary L. Goldberger·Shlomo Havlin·Michael G. Rosenblum·Zbigniew Struzik·H. Eugene Stanley
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Abstract

Recent evidence suggests that physiological signals under healthy conditions may have a fractal temporal structure. 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 properties. We report on evidence for multifractality in a biological dynamical system --- the healthy human heartbeat. Further, we 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.

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Plamen Ch. Ivanov, Luís A. Nunes Amaral, Ary L. Goldberger, Shlomo Havlin, Michael G. Rosenblum, Zbigniew Struzik, H. Eugene Stanley. 1999-05-21. Multifractality in Human Heartbeat Dynamics. https://doi.org/10.1038/20924

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