[New experimental evidence of complex dynamics of heart beat. II. Correlation dimension, Lyapunov's exponents].
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.
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Istituto di Cardiologia, Cattedra di Cardiologia, Seconda Università degli Studi, Napoli.
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D000465:Algorithms; D004562:Electrocardiography / Q000379:methods*; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D017711:Nonlinear Dynamics; D010138:Pacemaker, Artificial