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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 Measurement

R

Bias ± 1.96 SD

ICC

Interobserver

Circumferential

0.84

−0.013 ± 0.06

0.82

Radial

0.85

−0.024 ± 0.15

0.84

Intraobserver

Circumferential

0.91

0.002 ± 0.04

0.87

Radial

0.82

0.003 ± 0.22

0.75