Behavioral-Independent Features of Complex Heartbeat Dynamics
Preprint
- 25 June 2001
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.Keywords
All Related Versions
- Version 1, 2001-06-25, ArXiv
- Published version: Physical Review Letters, 86 (26), 6026.
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