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Spectral Statistics of RR Intervals in ECG

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arxiv physics/0301011 v1 pith:EF4OE7ZR submitted 2003-01-08 physics.med-ph q-bio

Spectral Statistics of RR Intervals in ECG

M. Martinis , V. Mikuta-Martinis , A. Knezevic , J. Crnugelj (Rudjer Boskovic Institute , Zagreb , Croatia) This is my paper
classification physics.med-ph q-bio
keywords intervalsheartbeatdistributionbrodytheoryappliedberry-robnikbeta
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The statistical properties (fluctuations) of heartbeat intervals (RR intervals) in ECG are studied and compared with the predictions of Random Matrix Theory (RMT). It is found that heartbeat intervals only locally exhibit the fluctuation patterns (universality) predicted by the RMT. This finding shows that heartbeat dynamics is of the mixed type where regular and irregular (chaotic) regimes coexist and the Berry-Robnik theory can be applied. It is also observed that the distribution of heartbeat intervals is well described by the one-parameter Brody distribution. The parameter $\beta $ of the Brody distribution is seen to be connected with the dynamical state of the heart.

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