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Behavioral-Independent Features of Complex Heartbeat Dynamics

Luis A. Nunes Amaral·Plamen Ch. Ivanov·Naoko Aoyagi·Ichiro Hidaka·Shinji Tomono·Ary L. Goldberger·H. Eugene Stanley·Yoshiharu Yamamoto
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Abstract

We test whether the complexity of cardiac interbeat interval time series is simply a consequence of the wide range of scales characterizing human behavior, especially physical activity, by analyzing data taken from healthy adult subjects under three conditions with controls: (i) a ``constant routine'' protocol where physical activity and postural changes are kept to a minimum, (ii) sympathetic blockade, and (iii) parasympathetic blockade. We find that when fluctuations in physical activity and other behavioral modifiers are minimized, a remarkable level of complexity of heartbeat dynamics remains, while for neuroautonomic blockade the multifractal complexity decreases.

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Luis A. Nunes Amaral, Plamen Ch. Ivanov, Naoko Aoyagi, Ichiro Hidaka, Shinji Tomono, Ary L. Goldberger, H. Eugene Stanley, Yoshiharu Yamamoto. 2001-06-25. Behavioral-Independent Features of Complex Heartbeat Dynamics. https://doi.org/10.1103/physrevlett.86.6026

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