PMID: 12786404Jun 6, 2003Paper

Low-order chaos in sympathetic nerve activity and scaling of heartbeat intervals

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Motohisa OsakaTakao Saruta

Abstract

The mechanism of 1/f scaling of heartbeat intervals remains unknown. We recorded heartbeat intervals, sympathetic nerve activity, and blood pressure in conscious rats with normal or high blood pressure. Using nonlinear analyses, we demonstrate that the dynamics of this system of three variables is low-order chaos, and that sympathetic nerve activity leads to heartbeat interval and blood pressure changes. It is suggested that impaired regulation of blood pressure by sympathetic nerve activity is likely to cause experimentally observable steeper scaling of heartbeat intervals in hypertensive (high blood pressure) rats.

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Citations

Apr 27, 2005·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Mari A Watanabe, Georg Schmidt
Apr 14, 2005·IEEE Transactions on Bio-medical Engineering·Ernesto PeredaJulián J González
Oct 14, 2008·Biophysical Journal·Takahiro HaradaHiroshi Kori
Mar 16, 2018·Journal of Nippon Medical School = Nippon Ika Daigaku Zasshi·Motohisa Osaka
Dec 24, 2005·American Journal of Physiology. Heart and Circulatory Physiology·Frank BeckersAndré E Aubert

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