Nov 3, 2001

Scale invariance in the nonstationarity of human heart rate

Physical Review Letters
P Bernaola-GalvánH. Eugene Stanley


We introduce a segmentation algorithm to probe the temporal organization of heterogeneities in human heartbeat interval time series. We find that the lengths of segments with different local mean heart rates follow a power-law distribution and show that this scale-invariant structure is not a simple consequence of the long-range correlations present in the data. The differences in mean heart rates between consecutive segments display a common functional form, but with different parameters for healthy individuals and for heart-failure patients. These findings suggest that there is relevant physiological information hidden in the heterogeneities of the heartbeat time series.

  • References11
  • Citations32


  • References11
  • Citations32


Mentioned in this Paper

Heart Beat
Biologic Segmentation
Monte Carlo Method
Heart Diseases
Pulse Rate
Heart Failure

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