Modelling the dynamics of angles of human R-R intervals.
Heart rate variability (HRV) data from young healthy humans is expanded into two components, namely, the angles and radii of a map of R-R intervals. It is shown that. for most subjects at rest breathing spontaneously, the map of successive angles reveals a highly deterministic structure after the frequency range below approximately 0.05 Hz has been filtered out. However, no obvious low-dimensional structure is found in the map of successive radii. A recently proposed model describing the map of angles for a periodic self-oscillator under external periodic and quasiperiodic forcing is successfully applied to model the dynamics of such angles.
Janson
N B
NB
Department of Physics, Lancaster University, UK. n.janson@lancaster.ac.uk
Balanov
A G
AG
Anishchenko
V S
VS
McClintock
P V
PV
D004562:Electrocardiography; D005583:Fourier Analysis; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008955:Models, Cardiovascular; D010507:Periodicity