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GLOSSARY OF TERMS USED IN TIME SERIES ANALYSIS
OF CARDIOVASCULAR DATA
ATTRACTOR

Object to which the time series in a phase space is attracted to.

A strange attractor has a fractal geometry which may suggest that the time series stems from a chaotic dynamic system. Displays of heart rate return maps  show structures suggestive of a strange attractor (Guzzetti et al., 1996).


 Phase space plot of the Lorenz system.

References:
Guzzetti S et al (1996) Non-linear dynamics and chaotic indices in heart rate variability of normal subjects and heart-transplanted patients. Cardiovasc Res.



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