New experimental evidence of complex dynamics of heart beat. II. Correlation dimension, Lyapunov's exponents
Pierro, C.; Pierro, V.; Iacono, A.
Cardiologia 43(8): 819-824
1998
ISSN/ISBN: 0393-1978 PMID: 9808872 Document Number: 496728
In this paper we applied mathematical techniques of non-linear dynamics, to an ECG signal. The first step is to compute the shift-delay time, via average displacement of the digital ECG. Phase space is constructed at a prescribed shift-delay and correlation dimension and dominant Lyapounov exponent versus the embedding dimension are monitored. This technique was applied to 5 healthy volunteers and 4 patients with VVI pacemaker.