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. Author manuscript; available in PMC: 2022 Nov 1.
Published in final edited form as: J Electrocardiol. 2021 Oct 2;69:96–104. doi: 10.1016/j.jelectrocard.2021.09.014

Figure 3.

Figure 3.

Bland-Altman plots demonstrating agreement of spatial area QRS-T angle on two ECGs. Median beats were constructed in (A) normal sinus (N) rhythm, (B) atrial fibrillation/flutter, (C) ventricular pacing, including (D) ≤6 N beats, (E) 7–9 N beats, (F) ≥10 N beats. The scatterplot presents paired differences (Y-axis), plotted against pair-wise means (X-axis). The reference line indicates the perfect average agreement, Y = 0. The central green line indicates the mean difference between the two measurements, or mean bias. Upper and lower lines represent the mean ± 2 standard deviations (SD), or 95% limits of agreement.