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• W2318325447 abstract "Human heart rate variability, in the form of time series of intervals between heart beats, shows complex, fractal properties. Recently, it was demonstrated many times that the fractal properties vary from point to point along the series, leading to multifractality. In this paper, we concentrate not only on the fact that the human heart rate has multifractal properties but also that these properties depend on the time scale in which the multifractality is measured. This time scale is related to the frequency band of the signal. We find that human heart rate variability appears to be far more complex than hitherto reported in the studies using a fixed time scale. We introduce a method called multiscale multifractal analysis (MMA), which allows us to extend the description of heart rate variability to include the dependence on the magnitude of the variability and time scale (or frequency band). MMA is relatively immune to additive noise and nonstationarity, including the nonstationarity due to inclusions into the time series of events of a different dynamics (e.g., arrhythmic events in sinus rhythm). The MMA method may provide new ways of measuring the nonlinearity of a signal, and it may help to develop new methods of medical diagnostics." @default.
• W2318325447 created "2016-06-24" @default.
• W2318325447 creator A5008467095 @default.
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• W2318325447 date "2012-02-17" @default.
• W2318325447 modified "2023-10-18" @default.
• W2318325447 title "Multiscale multifractal analysis of heart rate variability recordings with a large number of occurrences of arrhythmia" @default.
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• W2318325447 doi "https://doi.org/10.1103/physreve.85.021915" @default.
• W2318325447 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22463252" @default.
• W2318325447 hasPublicationYear "2012" @default.
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