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Published in: European Radiology 12/2022

Open Access 25-05-2022 | Magnetic Resonance

Quantitative normal values of helical flow, flow jets and wall shear stress of healthy volunteers in the ascending aorta

Authors: Sebastian Ebel, Alexander Kühn, Abhinav Aggarwal, Benjamin Köhler, Benjamin Behrendt, Robin Gohmann, Boris Riekena, Christian Lücke, Juliane Ziegert, Charlotte Vogtmann, Bernhard Preim, Siegfried Kropf, Bernd Jung, Timm Denecke, Matthias Grothoff, Matthias Gutberlet

Published in: European Radiology | Issue 12/2022

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Abstract

Objectives

4D flow MRI enables quantitative assessment of helical flow. We sought to generate normal values and elucidate changes of helical flow (duration, volume, length, velocities and rotational direction) and flow jet (displacement, flow angle) as well as wall shear stress (WSS).

Methods

We assessed the temporal helical existence (THEX), maximum helical volume (HVmax), accumulated helical volume (HVacc), accumulated helical volume length (HVLacc), maximum forward velocity (maxVfor), maximum circumferential velocity (maxVcirc), rotational direction (RD) and maximum wall shear stress (WSS) as reported elsewhere using the software tool Bloodline in 86 healthy volunteers (46 females, mean age 41 ± 13 years).

Results

WSS decreased by 42.1% and maxVfor by 55.7% across age. There was no link between age and gender regarding the other parameters.

Conclusion

This study provides age-dependent normal values regarding WSS and maxVfor and age- and gender-independent normal values regarding THEX, HVmax, HVacc, HVLacc, RD and maxVcirc.

Key Points

• 4D flow provides numerous new parameters; therefore, normal values are mandatory.
• Wall shear stress decreases over age.
• Maximum helical forward velocity decreases over age.
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Metadata
Title
Quantitative normal values of helical flow, flow jets and wall shear stress of healthy volunteers in the ascending aorta
Authors
Sebastian Ebel
Alexander Kühn
Abhinav Aggarwal
Benjamin Köhler
Benjamin Behrendt
Robin Gohmann
Boris Riekena
Christian Lücke
Juliane Ziegert
Charlotte Vogtmann
Bernhard Preim
Siegfried Kropf
Bernd Jung
Timm Denecke
Matthias Grothoff
Matthias Gutberlet
Publication date
25-05-2022
Publisher
Springer Berlin Heidelberg
Published in
European Radiology / Issue 12/2022
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-022-08866-5

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