Key result
Delayed-enhancement MRI using commercially available tools successfully visualized radiofrequency lesions in 67% (8 of 12) of interpretable images from Japanese patients post-AF ablation.
Why the study?
Can radiofrequency lesions be visualized using delayed-enhancement MRI with commercially available tools in patients who have undergone atrial fibrillation ablation?
Observational (n=15)
Can radiofrequency lesions be visualized using delayed-enhancement MRI with commercially available tools in patients who have undergone atrial fibrillation ablation?
Delayed-enhancement MRI using commercially available tools can successfully visualize radiofrequency lesions in patients post-atrial fibrillation ablation.
Answers are grounded in this paper and cite their sources.
Commercial MRI may visualize RF lesions post-AF ablation; leaves open its role in guiding repeat procedures or improving outcomes.
BACKGROUND: Atrial tissue fibrosis has previously been identified using delayed-enhancement MRI (DE-MRI) in patients with atrial fibrillation (AF). Although the clinical importance of DE-MRI is well recognized, the visualization of atrial fibrosis and radiofrequency (RF) lesions has still not been achieved in Japan, primarily because of the differences in contrast agents, volume-rendering tools, and technical experience. The objective of this study was to visualize RF lesions by using commercially available tools. METHODS: DE-MRI was performed in 15 patients who had undergone AF ablation (age, 59±4 years, left atrium diameter, 40±2 mm). Specific parameters for MR scanning obtained from previous reports were modified. RESULTS: Of the 15 images, the images of three patients were uninterpretable owing to low image quality. RF lesions could be visualized in 8 (67%) of the 12 patients. CONCLUSIONS: In the current study, we successfully demonstrated that RF lesions could be visualized in Japanese patients using DE-MRI, although only commercially available tools were used.
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Kiuchi et al. (2014) conducted an observational in Atrial fibrillation (n=15). Delayed-enhancement MRI (DE-MRI) was evaluated on Visualization of radiofrequency (RF) lesions. Delayed-enhancement MRI using commercially available tools successfully visualized radiofrequency lesions in 67% (8 of 12) of interpretable images from Japanese patients post-AF ablation.
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