Figure 7 Inter-observer variability of AT/ET in apical and right parasternal approaches.
Upper raw: Correlogram and Bland-Altman plot of measurements by two observers (A and B) for apical window (3C and 5C) tracings.Lower raw: Correlogram and Bland-Altman plot of measurements by two observers (A and B) for right parasternal window (R) tracings. Correlation coefficient was slightly smaller in R (0.826) than in 3C and 5C (0.867). Coefficient of variation (CV) was slightly greater for the R approach (7.92%) than for the 3C and 5C approach (6.11%).