Presentation on theme: "Application of DFA to heart rate variability"— Presentation transcript:
1 Application of DFA to heart rate variability Mariusz Sozański*, Jan Żebrowski*, Rafał Baranowski+Application of DFA to heart rate variability*Faculty of Physics, Warsaw University of Technology+National Institute of Cardiology, Warsaw
2 1. Intro – overview of DFA1. Intro – overview of DFARR
4 1. Intro – overview of the method If we observe scaling:We may conclude that:For a=0.5 fluctuations are not self-correlated;For 0.5<a<1 long-range correlations exist;For 0<a<0.5 long-range anticorrelations exist;a=1 corresponds to flicker (1/f) noise;a=1.5 corresponds to Brownian noise;In other words:the „smoother” the time series, the bigger a is obtained.