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Abstract #0260

The Dual-IR Sequence Improves the Inter-Observer Correlation in Post-Ablation Atrial Scar Size Measurements Compared to the Traditional IR Sequence.

Sarah Anne Peel1, Aruna Arujuna1, 2, James Harrison1, 2, Zhong Chen1, 2, Kawal Rhode1, Jaswinder Gill1, 2, Reza Razavi1, 2, Tobias Schaeffter1, Rene M. Botnar1

1Imaging Sciences and Bioengineering, King's College London, London, United Kingdom; 2Department of Cardiology, Guys and St. Thomas NHS Foundation Trust, London, United Kingdom

In 11 patients, the dual-IR and IR sequences were compared for late gadolinium enhancement imaging of atrial wall scar 3 months after radiofrequency ablation for atrial fibrillation. The dual-IR sequence at 20 minutes post-contrast produced a two-fold higher inter-observer correlation for post-ablation atrial scar size measurements compared to the IR sequence at 25 minutes.