Fig. 4: Assessment of intra- and interobserver variability in longitudinal strain measurements. | Pediatric Research

Fig. 4: Assessment of intra- and interobserver variability in longitudinal strain measurements.

From: Cardiac adaptations to patent ductus arteriosus ligation in preterm infants: a speckle-tracking study

Fig. 4

a Intraobserver variability plots for LVGLS, RVFWSL, and LASr strain parameters. b Interobserver variability plots for the same parameters across two different observers. The three dashed lines show biases (means of differences) and limits of agreement. Bias is expressed as the mean of the difference (95% confidence interval). The limit of agreement is shown as the bias ± 2 SDs. LVGLS left ventricular global longitudinal strain (average), RVFWSL right ventricular free wall longitudinal strain, LASrED left atrial reservoir strain with a reference time point at end-diastole, LASctED left atrial contraction strain with a reference time point at end-diastole, SD standard deviation.

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