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Abstract #2076

Arrhythmia Insensitive Rapid versus Modified Look Locker Inversion Recovery T1 mapping in mitral valve prolapse patients

Ernest Cheung1, Hui-Chen Han1, Emma Hornsey1, Leonid Churilov2,3, Kyung Pyo Hong4, Han Lim1,2, Julie Smith1, Daniel Kim4, and Ruth Lim1,2
1Austin Health, Melbourne, Australia, 2The University of Melbourne, Melbourne, Australia, 3The Florey Institute of Neuroscience and Mental Health, Melbourne, Australia, 4Northwestern University, Evanston, IL, United States

We compare two cardiac T1 mapping techniques, arrhythmia insensitive rapid (AIR) which is a saturation recovery technique acquired in a short breath-hold and robust to arrhythmia, and Modified Look-Locker inversion recovery (MOLLI), in 55 patients with mitral valve prolapse. There was excellent inter-reader agreement in T1 values and extracellular volume (ECV) between techniques. However, higher T1 values were observed in AIR compared to MOLLI and vice versa for ECV, consistent with previous studies reporting significantly different T1 and ECV values between inversion recovery and saturation recovery techniques. These differences are important to consider when applying T1 mapping to clinical practice.

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