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Assessment of flow instabilities in the healthy aorta using flow‐sensitive MRI by Aurélien F. Stalder; Alex Frydrychowicz; Max F. Russe; Jan G. Korvink; Jürgen Hennig; Kuncheng Li; Michael Markl is a Medicine article available to read on EtoBox.

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## Abstract ## Purpose: To assess blood flow velocities and spatial distribution of aortic Reynolds numbers in vivo using flow‐sensitive magnetic resonance imaging (MRI) and probe for flow instabilities along the aorta based on an empirical model for physiological pulsatile blood flow. ## Materials and Methods: Thirty young healthy volunteers were examined by flow‐sensitive MRI at eight imaging planes distributed along the thoracic aorta. Flow, Womersley, Strouhal, Reynolds, and critical Reynolds numbers were calculated and used to assess the presence of flow instabilities. ## Results: The average peak Reynolds number was higher in the ascending (≈4500) and descending aorta (≈4200) than in the aortic arch (≈3400). According to the calculated critical Reynolds numbers, flow instabilities were prominent in the ascending (14/30 volunteers) and descending aorta (22/30 volunteers) but not in the aortic arch (3/30 volunteers). A significant difference (__P__ < 0.05) in supracritical peak Reynolds numbers was observed between genders. The supracritical Reynolds number, indicating flow instabilities, significantly correlated (__P__ < 0.05) with body weight (__r__ = 0.34), aortic diameter (

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Author

Aurélien F. Stalder; Alex Frydrychowicz; Max F. Russe; Jan G. Korvink; Jürgen Hennig; Kuncheng Li; Michael Markl

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1053-1807)

Published

2011

Language

EN

Field

Medicine (Health Sciences)