Fig. 2

Bland-Altman plots comparing RA volume measurements by SAX and AL methods (A) RA maximum volume including RAA; (B) RA minimum volume including RAA; (C) RA maximum volume excluding RAA; (D) RA minimum volume excluding RAA. The red solid line represents the mean difference (bias), and the green dotted lines indicate the upper and lower limits of agreement (LoA). AL, area-length method; LoA, limits of agreement; MD, mean difference; RA, right atrium; RAA, right atrial appendage; SAX, short-axis stack method