Behavioral-Independent Features of Complex Heartbeat Dynamics

Details Behavioral-Independent Features of Complex Heartbeat Dynamics Behavioral-Independent Features of Complex Heartbeat Dynamics

2001-06-25

arxiv.org/abs/cond-mat/0106508v1

Phys Rev Lett 86, 6026-6029 (2001)

Physics

Condensed Matter

Statistical Mechanics

4 pages with 6 eps figures. Latex file. For more details or for downloading the PDF file of the published article see http:/

Scientific paper

10.1103/PhysRevLett.86.6026

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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