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. 2018 Jan 22;9:10. doi: 10.3389/fphys.2018.00010

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Copyright © 2018 Li, Rüdiger, Haase and Ziemssen.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Illustration of the BRS calculation process using TRS. Spontaneous oscillations of RR intervals and systolic blood pressure (A) are replaced by theoretical TRS oscillations (B). Calculation of BRS as the slope of the regression line (D) originates from coherent oscillation pairs of RR interval and systolic blood pressure (C). Points 1 and 2 are two examples of coherent oscillation pairs of RR intervals and systolic blood pressures. [Taken from Gasch et al. (2011)].