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
Intraobserver
0.91
0.002 ± 0.04
0.87
0.003 ± 0.22
0.75