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Atrial fibrillation (AF) is the most common cardiac rhythm disturbance affecting more than 2 million people in the United States. Pulmonary vein isolation (PVI) procedure using RF ablation has emerged as a new promising treatment of AF. Reported procedure success rates vary significantly with recurrences ranging from 40-86%. With introduction of EP-MRI suites, patients may be re-ablated immediately after assessment of the extent of LA wall injury, if necessary. Late gadolinium enhancement (LGE) [1,2] and double inversion recovery (DIR) prepared T2weighted (T2w) fast/turbo spin echo (FSE/TSE) [3-5] were proposed to evaluate acute LA wall injury. The main disadvantages of these sequences are a long scan time and a strong dependence of image quality on heart rate regularity.

Use of HASTE MRI in the evaluation of acute injury to left atrial wall caused by RF ablation