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. 2018 Apr 4;9:147. doi: 10.3389/fphys.2018.00147

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Copyright © 2018 Porter, van Duijvenboden, Bishop, Orini, Claridge, Gould, Sieniewicz, Sidhu, Razavi, Rinaldi, Gill and Taggart.

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) and the copyright owner 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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Effect of Valsalva on low frequency (LF) power and normalized LF (nLF) power of (A) activation recovery intervals (ARIs), (B) systolic blood pressure (SBP), and (C) the maximum rate of systolic pressure increase (dP/dt_max) at rest and following the Valsalva.