Istituto di Biofisica     
Allegrini P., Balocchi R., Chillemi S., Grigolini P., Palatella L., Raffaelli G. Short-and Long-Term Statistical Properties of Heartbeat Time-Series in Healthy and Pathological Subjects. In: ISMDA - Medical Data Analysis.Third International Symposium (Rome, 10-11 October 2002). Proceedings, pp. 115 - 126. Alfredo Colosimo, Alessandro Giuliani, Paolo Sirabella. (Lecture Notes in Computer Science, vol. 2526). Springer, 2002.
We analize heartbeat time-series corresponding to several groups of individuals (healthy, heart transplanted, with congestive heart failure (CHF), after myocardial infarction (MI), hypertensive), looking for short- and long-time statistical behaviors. In particular we study the persistency patterns of interbeat times and interbeat-time variations. Long-range correlations are revealed using an information-based technique which makes a wise use of the available statistics. The presence of strong long-range time correlations seems to be a general feature for all subjects, with the exception of some CHF individuals. We also show that short time-properties detected in healthy subjects, and seen also in hypertensive and MI patients, and completely absent in the trasplanted, are characterized by a general behavior when we apply a proper coarsegraining procedure for time series analysis.
DOI: 10.1007/3-540-36104-9_13
Subject Diffusion entropy
Congestive heart failure

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