There is evidence that physiological signals under healthy conditions may have a fractal
temporal structure. Here we investigate the possibility that time series generated by certain …

Multifractal phenomena in physics and chemistry Page 1 NATURE VOL. 335 29 SEPTEMBER
1988 REVIEW ARTICLE 495 Multifractal phenomena in physics and chemistry H. Eugene …

Even under healthy, basal conditions, physiologic systems show erratic fluctuations
resembling those found in dynamical systems driven away from a single equilibrium state …

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 …

According to classical concepts of physiologic control, healthy systems are self-regulated to
reduce variability and maintain physiologic constancy. Contrary to the predictions of …

SUSTAINED nonequiibrium systems can be characterized by a fractal dimension D⩾ 0,
which can be considered to be a measure of the number of independent degrees of …

We present several recent studies based on statistical physics concepts that can be used as
diagnostic tools for heart failure. We describe the scaling exponent characterizing the long …

In recent years the study of the statistical properties of heartbeat interval sequences has
attracted the attention of researchers from different fields. 18–22 Analysis has focused …

In this paper, we participate to the discussion set forth by the editor of Chaos for the
controversy,“Is the normal heart rate chaotic?” Our objective was to debate the question,“Is …

We report some recent attempts to understand the dynamics of complex physiologic
fluctuations by adapting and extending concepts and methods developed very recently in …