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Relationship between AF types and beta-blocker therapy on aSKNA, VR and slopes of linear regression. The box-and-whiskers plots (A-C) show that there were no differences of aSKNA, VR and average slope of linear correlation, respectively, between paroxysmal and persistent AF. The box-and-whiskers plots (D-F) show that beta blocker (BB) therapy did not change the aSKNA, VR or the slopes of linear correlation, respectively. P values were determined by the Mann-Whitney U test.
