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Magnetic Resonance Materials in Physics, Biology and Medicine

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31.01.2020 | Research Article

Impact of ascending aorta replacement by graft on elastic properties of descending thoracic aorta evaluated by cardiac magnetic resonance imaging

verfasst von: Marie-Catherine Morgant, Johel Miteran, Siyu Lin, Aline Laubriet, Alexandre Cochet, Alain Lalande, Olivier Bouchot

Erschienen in: Magnetic Resonance Materials in Physics, Biology and Medicine | Ausgabe 5/2020

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Abstract

Objective

The aim of our study was to evaluate the impact of aortic root replacement by graft on the elastic properties of the descending thoracic aorta using cardiac magnetic resonance imaging (MRI) and automatic post-processing.

Materials and methods

Nineteen patients were operated for an aortic root aneurysm. Cardiac MRI was performed before and after surgery to measure aortic compliance. Images were acquired on a 1.5 T MRI with a conventional aortic MRI protocol plus one additional kinetic sequence orientated perpendicularly to the aorta at the level of pulmonary trunk. The contours of the ascending and descending aortas were detected automatically for each phase with homemade software.

Results

Mean time between surgical procedure and earliest post-operative MRI was 18.2 ± 7.1 months. There was no significant difference between the pre- and earliest post-operative mean descending aorta areas and no significant modification in descending aortic compliance after aortic root replacement (1.43 ± 0.84 vs 1.37 ± 0.58 mm²/mmHg, p = 0.47). Pre- and post-operative systolic and diastolic blood pressure were similar. There was a significant decrease in ascending aortic compliance after surgery (2.52 ± 1.24 vs 0.91 ± 0.52 mm²/mmHg; p < 0.0001).

Discussion

The aortic root replacement by graft was not associated with changes in elastic properties of the descending aorta at short term.

Clinical registration number

NCT03817008.

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Titel: Impact of ascending aorta replacement by graft on elastic properties of descending thoracic aorta evaluated by cardiac magnetic resonance imaging
verfasst von: Marie-Catherine Morgant
Johel Miteran
Siyu Lin
Aline Laubriet
Alexandre Cochet
Alain Lalande
Olivier Bouchot
Publikationsdatum: 31.01.2020
Verlag: Springer International Publishing
Erschienen in: Magnetic Resonance Materials in Physics, Biology and Medicine / Ausgabe 5/2020
Print ISSN: 0968-5243
Elektronische ISSN: 1352-8661
DOI: https://doi.org/10.1007/s10334-020-00829-5

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Impact of ascending aorta replacement by graft on elastic properties of descending thoracic aorta evaluated by cardiac magnetic resonance imaging

Abstract

Objective

Materials and methods

Results

Discussion

Clinical registration number

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Springer Medizin

Abstract

Objective

Materials and methods

Results

Discussion

Clinical registration number

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