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Figure 5 Effect of electrogram-guided ablation on dominant frequency (DF). A representative example of fast Fourier transformation analysis of left atrial electrograms before (A) and after (B) electrogram-guided ablation is shown. A 10-s fragment of the 60-s sample was magnified to better illustrate the electrograms in both panels. As described in the text, fast Fourier transformation analysis was performed using samples 60-s long. There was a marked decrease in the DF after electrogram-guided ablation.
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