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Abstract #2540

Dependence of RF Lesion Visibility in Native T1-weighted MRI on Time after RF Ablation

Eugene G. Kholmovski1,2, Ravi Ranjan2, Sathya Vijayakumar1,2, Nathan A. Angel2, and Nassir F. Marrouche2

1UCAIR, Department of Radiology, University of Utah, Salt Lake City, UT, United States, 2CARMA Center, University of Utah, Salt Lake City, UT, United States

Catheter RF ablation is a widely accepted procedure for treatment of cardiac arrhythmias. Recently, native (non-contrast) T1-weighted (T1w) MRI was proposed to characterize RF lesions immediately post-ablation. The main aim of this work was to study how the visibility and volume of RF lesions in native T1w MRI changes with time after ablation. We have found that reduction of T1 relaxation time of RF ablated myocardium is transient. The visibility of RF ablation lesions and volume of the corresponding enhanced regions in native T1w MRI drastically reduce few days after ablation.

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