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Abstract #0076

Delayed Enhancement MRI Detects RF Ablation pattern in the Left Atrium and Pulmonary Vein Ostia

Wylie J, Essebag V, Josephson M, Botnar R, Hauser T, Kissinger K, Peters D, Manning W
Beth Israel Deaconess Medical Center, and Harvard Medical School

The visualization of left atrium scar after RF ablation treatment of patients with atrial fibrillation would allow refinement of this treatment. We have developed a 3D high resolution delayed enhancement technique and applied it in 31 studies of patients before and/or after pulmonary vein isolation. Hyperenhancement of the left atrium and the pulmonary vein ostia was observed in 100% of good quality studies after ablation, and in 0% of good quality studies before ablation. Partial or complete circumferential ablation patterns could be detected, and a relationship between scar thickness and time since ablation was observed.