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Résumé

La détection de l’ischémie myocardique est cruciale dans la prise en charge des patients coronariens ou ayant une insuffisance coronaire suspectée. Au-delà de l’étude angiographique coronaire, cette approche a l’avantage de préciser le retentissement fonctionnel des sténoses coronaires. Elle permet par la présence ou l’absence d’une ischémie myocardique, par son extension, de mieux stratifier le pronostic des patients et la nécessité de revascularisation. Comme toute technique d’imagerie couplée à une épreuve de stress, l’IRM de stress est une méthode de deuxième ligne lorsque l’épreuve d’effort ne permet pas de conclure ou est irréalisable. Les situations pour lesquelles l’épreuve d’effort est non contributive sont nombreuses : impossibilité d’atteindre la fréquence cardiaque cible, les contreindications à l’épreuve d’effort, l’artéritique ou les problèmes orthopédiques, les cas de lecture difficile ou impossible du segment ST de l’ECG. L’IRM de stress, non irradiante et sans danger pour le patient, permet de préciser la localisation et l’extension d’une ischémie myocardique. Les informations complémentaires sont nombreuses, telles que l’anatomie cardiaque, l’étude de la fonction ventriculaire et l’analyse de la viabilité myocardique. Deux grandes modalités d’IRM de stress sont disponibles :

  • l’imagerie de perfusion au cours d’un stress sous adénosine ou dipyridamole ;

  • l’IRM en mode ciné sous dobutamine.

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© 2011 Springer-Verlag France, Paris

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Garot, J. (2011). L’IRM de stress. In: Imagerie en coupes du cœur et des vaisseaux. Springer, Paris. https://doi.org/10.1007/978-2-8178-0212-1_16

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  • DOI: https://doi.org/10.1007/978-2-8178-0212-1_16

  • Publisher Name: Springer, Paris

  • Print ISBN: 978-2-8178-0211-4

  • Online ISBN: 978-2-8178-0212-1

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