ABC | Volume 114, Nº3, March 2020

Original Article Sousa et al. Software: analysis of strain curves Arq Bras Cardiol. 2020; 114(3):496-506 Figure 9 – Global longitudinal strain values obtained by EchoPAC and D-Station in relation to the equality line. –5 –5 –10 –10 –15 –15 –20 –20 –25 –25 GLS_EchoPAC GLS_D.Station Correlation: Spearman’s rho = 0.99 Figure 8 – Shapiro-Wilk normality test. Data: cran$Dif W = 0.96266, p-value = 0.1293 Figure 10 – Paired t-test data: GLS_Echopac and GLS.D.Station t = –0.41525, df = 47, p-value = 0.6798 alternative hypothesis: true difference in means is not equal to 0 95 percent confidence interval: –0.2033456 0.1337622 sample estimates: – 0.03479167 503