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. 2017 Nov 2;8:872. doi: 10.3389/fphys.2017.00872

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Copyright © 2017 Semenyutin, Asaturyan, Nikiforova, Aliev, Panuntsev, Iblyaminov, Savello and Patzak.

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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Results of examination of a 59-year-old man with 97% asymptomatic right carotid artery stenosis and impaired dynamic autoregulation on ipsilateral side. From left to right: carotid angiogram, multichannel monitoring of blood pressure (BP) and blood flow velocity in middle cerebral arteries over 5 min during compulsory breathing at a rate 6/min, phase shift (PS) and BP-amplitude spectra within the range of Mayer waves. From top to bottom: before and 7 days after carotid balloon angioplasty with stenting. The selected in-box area in spectral analysis comprises the significant harmonic components of PS to determine its average value.