Feedback effects of circulating norepinephrine on sympathetic outflow in healthy subjects.

Abstract

The amplitude of low-frequency (LF) oscillations of heart rate (HR) usually reflects the magnitude of sympathetic activity, but during some conditions, e.g., physical exercise, high sympathetic activity results in a paradoxical decrease of LF oscillations of HR. We tested the hypothesis that this phenomenon may result from a feedback inhibition of… (More)

Topics

4 Figures and Tables

Cite this paper

@article{Tulppo2005FeedbackEO, title={Feedback effects of circulating norepinephrine on sympathetic outflow in healthy subjects.}, author={Mikko Tulppo and Heikki Huikuri and Elli Tutungi and Derek S. Kimmerly and Adrian W. Gelb and Richard L. Hughson and Timo. H. M{\"a}kikallio and J. Kevin Shoemaker}, journal={American journal of physiology. Heart and circulatory physiology}, year={2005}, volume={288 2}, pages={H710-5} }