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. 2014 Oct 7;3(5):e001277. doi: 10.1161/JAHA.114.001277

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© 2014 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley Blackwell.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Figure 2. — A, Patients with a prolonged PR interval had an enlarged LA size and decreased LA voltage. B, Patients with a short PR interval had a relatively small LA size and preserved LA voltage compared to those with a prolonged PR interval. PR interval prolongation led to the clinical recurrence of AF after the RFCA. AF indicates atrial fibrillation; BSA, body surface area; LA, left atrium; PAF, paroxysmal AF; RFCA, radiofrequency catheter ablation.