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. 2020 May 25;10:8618. doi: 10.1038/s41598-020-65581-1

Figure 1.

Figure 1

Frequency distribution of the four groups enrolled (N = 100). PM = patients with a previously implanted pacemaker; AF = patients with permanent atrial fibrillation; POAF = patients with postoperative atrial fibrillation; NoAF=patients who did not experience atrial fibrillation.