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Abstract #3856

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

1 Service de Radiologie, AP-HM, Marseille, France, 2 CEMEREM (UMR CNRS 7339), Marseille, France, 3 LE2I (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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