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Modelling the dynamics of angles of human RR intervals

Research output: Contribution to journalJournal article

Published

<mark>Journal publication date</mark>08/2001
<mark>Journal</mark>Physiological Measurement
Issue3
Volume22
Number of pages15
Pages565-579
<mark>Original language</mark>English

Abstract

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 about 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.