Time-Resolved Response of Cerebral Stiffness to Hypercapnia in Humans

Kreft B, Tzschaetzsch H, Schrank F, Bergs J, Streitberger KJ, Waeldchen S, Hetzer S, Braun J, Sack I (2020)

Publication Type: Journal article, Review article

Publication year: 2020

Journal

Ultrasound in Medicine and Biology Elsevier

Book Volume: 46

Pages Range: 936-943

Journal Issue: 4

DOI: 10.1016/j.ultrasmedbio.2019.12.019

Abstract

Cerebral blood flow, cerebral stiffness (CS) and intracranial pressure are tightly linked variables of cerebrovascular reactivity and cerebral autoregulation. Transtemporal ultrasound time-harmonic elastography was used for rapid measurement of CS changes in 10 volunteers before, during and after administration of a gas mixture of 95% O2 and 5% CO2 (carbogen). Within the first 2.2 ± 2.0 min of carbogen breathing, shear wave speed determined as a surrogate parameter of CS increased from 1.57 ± 0.04 to 1.66 ± 0.05 m/s (p < 0.01) in synchrony with end-tidal CO2 while post-hypercapnic CS recovery was delayed by 2.7 ± 1.4 min in relation to end-tidal CO2. Our results indicate that CS is highly sensitive to changes in CO2 levels of inhaled air. Possible mechanisms underlying the observed CS changes might be associated with cerebrovascular reactivity, cerebral blood flow adaptation and intracranial regulation, all of which are potentially relevant for future diagnostic applications of transtemporal time-harmonic elastography in a wide spectrum of neurologic diseases.

Involved external institutions

Charité - Universitätsmedizin Berlin DE Germany (DE) Technische Universität Berlin DE Germany (DE) Berlin Center for Advanced Neuroimaging (BCAN) DE Germany (DE)

How to cite

APA:

Kreft, B., Tzschaetzsch, H., Schrank, F., Bergs, J., Streitberger, K.-J., Waeldchen, S.,... Sack, I. (2020). Time-Resolved Response of Cerebral Stiffness to Hypercapnia in Humans. Ultrasound in Medicine and Biology, 46(4), 936-943. https://doi.org/10.1016/j.ultrasmedbio.2019.12.019

MLA:

Kreft, Bernhard, et al. "Time-Resolved Response of Cerebral Stiffness to Hypercapnia in Humans." Ultrasound in Medicine and Biology 46.4 (2020): 936-943.

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