Fig. 5

Bland–Altman graphs representing the agreement between the measurement at the beginning of valve clicks and the measurement at the peak of valve clicks of the left myocardial performance index (LV-MPI) (A), isovolumetric contraction time (ICT) (B), isovolumetric relaxation time (IRT) (C), and ejection time (ET) (D). The mean differences of the two methods of measurement (solid horizontal lines) were 0.024 (95% CI, 0.019 to 0.029) for LV-MPI, 1.74 (95% CI, 1.35 to 2.13) for ICT, 2.27 (95% CI, 1.77 to 2.77) for IRT, and − 1.34 (95% CI, − 1.81 to − 0.87) for ET with 95% limits of agreement (LOA, dashed horizontal lines) of − 0.080 to 0.128 for LV-MPI, − 6.21 to 9.69 for ICT, − 8.09 to 12.63 for IRT, and − 10.97 to 8.29 for ET