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Table 2 Variability in 2DSTE strain measurements. Summary of intra- and inter-observer variability in 2D STE strain measurements (R = Pearson’s correlation coefficient, SD = standard deviation, ICC = intraclass correlation coefficient)

From: Regional myocardial strain analysis via 2D speckle tracking echocardiography: validation with sonomicrometry and correlation with regional blood flow in the presence of graded coronary stenoses and dobutamine stress

 Strain MeasurementRBias ± 1.96 SDICC
InterobserverCircumferential0.84−0.013 ± 0.060.82
Radial0.85−0.024 ± 0.150.84
IntraobserverCircumferential0.910.002 ± 0.040.87
Radial0.820.003 ± 0.220.75