Aortic elasticity measured by MRI is decreased during exercise in young adults.
Laurence Bal-Theoleyre 1,2 , Alain Lalande 3 , Franck Kober 2 , Monique Bernard 2 , and Alexis Jacquier 1,2
Service de Radiologie, AP-HM, Marseille,
(UMR CNRS 7339), Marseille, France,
(UMR CNRS 6306), Universit de Bourgogne, Dijon, France
The purpose of this study was to compare aortic
elasticity measured by MRI in young adults during rest
and exercise. On a 1.5 T imager, cine-FISP and sequences
with a velocity encoding gradient in the through-plane
direction were used to acquire images at different
levels of the aorta at rest and during supine exercise
on an amagnetic ergometer. Exercise was designed to
obtain twice the resting heart rate. Aortic compliance,
aortic distensibility and pulse wave velocity were
calculated. Stress induced a significant decrease in
aortic compliance and distensibility at all sites,
associated with an increase of the pulse wave velocity.
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