Abstract #4452
Assessment of Acute Cryo and RF Ablation Lesions by Non-contrast and Contrast Enhanced MRI Techniques: Similarities and Differences
Eugene G. Kholmovski 1 , Ravi Ranjan 2 , Joshua Silvernagel 2 , and Nassir F. Marrouche 2
1
UCAIR, Department of Radiology, University
of Utah, Salt Lake City, Utah, United States,
2
CARMA
Center, University of Utah, Salt Lake City, Utah, United
States
Catheter radio-frequency (RF) and cryo-ablations are
being increasingly used for treatment of atrial
fibrillation and ventricular tachycardia. However,
reported success rate of the procedures is moderate. The
main causes of procedure failure are tissue recovery and
gaps in ablation. The extent of ablations and lesion
permanency cannot be accurately evaluated by
conventional electro-physiological measurements. MRI can
be used to assess lesions dimension and to predict their
permanency. In this study, we have compared visibility
of acute cryo and RF ablation lesions using non-contrast
and contrast enhanced MRI techniques. Cryo and RF
lesions have similar appearance in post-contrast T1w and
LGE MRI images. However, the lesions have significantly
different appearance in native T1w and T2w images.
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