Feb 11, 2016

Multiscale Poincaré plots for visualizing the structure of heartbeat time series

BMC Medical Informatics and Decision Making
Teresa HenriquesAry L Goldberger

Abstract

Poincaré delay maps are widely used in the analysis of cardiac interbeat interval (RR) dynamics. To facilitate visualization of the structure of these time series, we introduce multiscale Poincaré (MSP) plots. Starting with the original RR time series, the method employs a coarse-graining procedure to create a family of time series, each of which represents the system's dynamics in a different time scale. Next, the Poincaré plots are constructed for the original and the coarse-grained time series. Finally, as an optional adjunct, color can be added to each point to represent its normalized frequency. We illustrate the MSP method on simulated Gaussian white and 1/f noise time series. The MSP plots of 1/f noise time series reveal relative conservation of the phase space area over multiple time scales, while those of white noise show a marked reduction in area. We also show how MSP plots can be used to illustrate the loss of complexity when heartbeat time series from healthy subjects are compared with those from patients with chronic (congestive) heart failure syndrome or with atrial fibrillation. This generalized multiscale approach to Poincaré plots may be useful in visualizing other types of time series.

  • References28
  • Citations2

References

Mentioned in this Paper

Heart Beat
Atrial Fibrillation
Data Interpretation, Statistical
Structure
Heart
Dace
Simulation
Two-Parameter Models
Analysis
Myocardial Failure

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