Multifractality in human heartbeat dynamics

Article

关键词: RATE-VARIABILITY;    TIME-SERIES;    FLUCTUATION;    TURBULENCE;    FORMALISM;    WAVELETS;    MODEL;    CHAOS;   

DOI  :  10.1038/20924

来源: SCIE

【 摘 要 】

There is evidence that physiological signals under healthy conditions may have a fractal temporal structure(1). 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 properties(2-6). We report on evidence 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.

【 授权许可】

Free