Feasibility, Reproducibility, and Agreement between Different Speckle Tracking Echocardiographic Techniques for the Assessment of Longitudinal Deformation
Table 2
Reproducibility analysis.
Intraobserver
Interobserver
COV (%)
ICC (95% CI)
COV (%)
ICC (95% CI)
2D Strain (%)
0.96 (0.89–0.98)
0.95 (0.88–0.97)
3P Strain (%)
0.95 (0.87–0.98)
0.94 (0.78–0.97)
4D Strain (%)
0.96 (0.90–0.98)
0.92 (0.88–0.95)
Apical views
2D Strain (%)
4 chamber view
0.91 (0.78–0.97)
0.88 (0.77–0.90)
2 chamber view
0.92 (0.81–0.97)
0.87 (0.75–0.96)
Apical long axis view
0.88 (0.68–0.95)
0.84 (0.91–0.99)
3P Strain (%)
4 chamber view
0.87 (0.68–0.95)
0.84 (0.67–0.94)
2 chamber view
0.89 (0.71–0.96)
0.87 (0.69–0.96)
Apical long axis view
0.83 (0.83–0.97)
0.80 (0.75–0.84)
COV: coefficient of variability; ICC: intraclass correlation coefficient. COV is expressed as mean ± SD.
