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Proceedings Paper

Probing temporal correlation in ventricular interbeat intervals during atrial fibrillation with local continuous DFA
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Paper Abstract

Using the method of local Continuous Detrended Fluctuation Analysis CDFA) we analyze the correlations of ventricular interbeat intervals of patients with Atrial Fibrillation (AF). CDFA yields a local Hoelder exponent h for a neighborhood around each point in the time series by determining the scaling of fluctuations with window size after detrending. We compare the histograms of Hoelder exponents for original data with those of randomly shuffled data and find some correlations not only in long-range windows but also at short time scales where interbeat intervals during AF have been believed to be random in nature. Furthermore, we find unique temporal correlation structures to occur only in the heart rate of patients who were in the survivor group when a follow up was conducted at least one year after data acquisition. We conclude that ventricular interbeat intervals during AF contain richer information than previously considered and the study of the local correlations may be useful in predicting mortality of the patients.

Paper Details

Date Published: 25 May 2004
PDF: 7 pages
Proc. SPIE 5467, Fluctuations and Noise in Biological, Biophysical, and Biomedical Systems II, (25 May 2004); doi: 10.1117/12.546885
Show Author Affiliations
Stefan Heinrichs, Univ. Konstanz (Germany)
Zbigniew R. Struzik, Univ. of Tokyo (Japan)
Japan Science and Technology Agency (Japan)
Junichiro Hayano, Nagoya City Univ. (Japan)
Yoshiharu Yamamoto, Univ. of Tokyo (Japan)
Japan Science and Technology Agency (Japan)


Published in SPIE Proceedings Vol. 5467:
Fluctuations and Noise in Biological, Biophysical, and Biomedical Systems II
Derek Abbott; Sergey M. Bezrukov; Andras Der; Angel Sanchez, Editor(s)

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