Naslov
Spectral Statistics of RR Intervals in ECG

Autori
Martinis, Mladen ; Mikuta-Martinis, Vesna ; Knežević, Andrea ; Črnugelj, Josip

Izvornik
Progress of Theoretical Physics Supplement (0375-9687) 150 (2003); 381-387

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
heartbeat intervals; fluctuations; distributions

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA