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 Churilov^2,3, Kyung Pyo Hong⁴, Han Lim^1,2, Julie Smith¹, Daniel Kim⁴, and Ruth Lim^1,2

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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