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. 2016 Jan 6;6:412. doi: 10.3389/fphys.2015.00412

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Copyright © 2016 Jarkovska, Valesova, Chvojka, Benes, Sviglerova, Florova, Nalos, Matejovic and Stengl.

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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Relationship of HRV and heart rate. (A) Correlation of TINN (geometrical parameter of HRV) and of RR interval. The straight line represents the linear fit of the data points. (B) Time courses of RR intervals (full squares) and of TINN parameters (open circles). The curves represent the exponential fits of the data points. (C) Time constants of the RR interval and TINN parameter kinetics. ^*Significantly different (p < 0.05).