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Abstract #3857

Left Atrial Volume Measurements Before and After Left Atrial Ablation for the Treatment of Atrial Fibrillation

Jerry Dale Walker, Jr. 1, Sathya Vijayakumar2, Eugene Kholmovski2, Chris McGann1, Nathan Burgon3, Joshua Cates3, Alan Morris3, Nassir Marrouche1

1Cardiovascular Division, University of Utah School of Medicine, Salt Lake City, UT, United States; 2UCAIR Radiology, University of Utah, Salt Lake City, UT, United States; 3CARMA Center, University of Utah, Salt Lake City, UT, United States

This study evaluated left atrial (LA) volume measurements using cardiac magnetic resonance (CMR) based angiography before and after LA radio frequency (RF) ablation therapy as a treatment strategy for atrial fibrillation. This study employs the use of a novel software program ( Corview ) to accurately calculate left atrial volumes in patients who underwent CMR enhanced MR angiography. The Corview software program allows for segmentation and single slice analysis of individual MRA images. The segmentations were then used to compute the three-dimensional volume of the LA. LA volumes were then recorded at different time intervals to track for changes.