Statistical analyses were performed using SPSS (version 25.0, IBM Corp., Chicago, IL, USA) and MedCalc (version 19, Ostend, Belgium). Continuous data with a normal distribution were presented as mean and standard deviation (mean ± SD). Categorical variables were described as frequencies or percentages. Bland-Altman plots were used to analyze the agreements among conventional ECV, synthetic ECV, CVF values, and the agreement between native T1myo and ECV values derived from the SAX views and corresponding LAX views. Pearson correlation analysis was used to determine the association among native T1myo, conventional ECV, synthetic ECV, CVF, Hct, and LV ejection fraction (LVEF). The significance of the differences between the 2 correlation coefficients was tested using the Fisher r-to-z transformation. The changes in CVF were evaluated using a one-way analysis of variance (ANOVA), while the variations in native T1myo, conventional ECV, and synthetic ECV were evaluated using repeated ANOVA. Inter-observer agreement was assessed using the intraclass correlation coefficient (ICC). A P value of <0.05 was considered statistically significant.

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