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07.05.2018 | Cardiac

Is MRI equivalent to CT in the guidance of TAVR? A pilot study

verfasst von: Agnes Mayr, Gert Klug, Sebastian J. Reinstadler, Hans-Josef Feistritzer, Martin Reindl, Christian Kremser, Christof Kranewitter, Nikolaos Bonaros, Guy Friedrich, Gudrun Feuchtner, Bernhard Metzler

Erschienen in: European Radiology | Ausgabe 11/2018

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Abstract

Objectives

To compare a comprehensive cardiovascular magnetic resonance imaging (MRI) protocol with contrast-enhanced computed tomography angiography (CTA) for guidance in transcatheter aortic valve replacement (TAVR) evaluation.

Methods and results

Non-contrast three-dimensional (3D) ‘whole heart’ MRI imaging for aortic annulus sizing and measurements of coronary ostia heights, contrast-enhanced MRI angiography (MRA) for evaluation of transfemoral routes as well as aortoiliofemoral-CTA were performed in 16 patients referred for evaluation of TAVR. Aortic annulus measurements by MRI and CTA showed a very strong correlation (r=0.956, p<0.0001; effective annulus area for MRI 430±74 vs. 428±78 mm² for CTA, p=0.629). Regarding decision for valve size there was complete consistency between MRI and CTA. Moreover, vessel luminal diameters and angulations of aortoiliofemoral access as measured by MRA and CTA showed overall very strong correlations (r= 0.819 to 0.996, all p<0.001), the agreement of minimal vessel diameter between the two modalities revealed a bias of 0.02 mm (upper and lower limit of agreement: 1.02 mm and -0.98 mm).

Conclusions

In patients referred for TAVR, MRI measurements of aortic annulus and minimal aortoiliofemoral diameters showed good to excellent agreement. Decisions based on MRI measurements regrading prosthesis sizing and transfemoral access would not have modified TAVR-strategy as compared to a CTA-based choice.

Key Points

• ‘Whole heart’ MRI and CTA measurements of aortic annulus correlate very strongly.

• MRI- and CTA-based prostheses sizing are in excellent agreement.

• MRA and CTA equally guide TAVR access strategy.

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Titel: Is MRI equivalent to CT in the guidance of TAVR? A pilot study
verfasst von: Agnes Mayr
Gert Klug
Sebastian J. Reinstadler
Hans-Josef Feistritzer
Martin Reindl
Christian Kremser
Christof Kranewitter
Nikolaos Bonaros
Guy Friedrich
Gudrun Feuchtner
Bernhard Metzler
Publikationsdatum: 07.05.2018
Verlag: Springer Berlin Heidelberg
Erschienen in: European Radiology / Ausgabe 11/2018
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-018-5386-2

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Is MRI equivalent to CT in the guidance of TAVR? A pilot study

Abstract

Objectives

Methods and results

Conclusions

Key Points

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Abstract

Objectives

Methods and results

Conclusions

Key Points

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