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Figure 4 Pooled data of the filtered P wave duration by the time domain analysis and AR20 by the frequency domain analysis before and after radiofrequency catheter ablation in patients with AVNRT, AVRT and AT. Ablation significantly shortened the filtered P wave duration (FPD) in AVRT but did not change in AVNRT and AT. AR20 was not changed in the three groups after ablation.
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