Table 2

Mean Difference and Limits of Agreement (±1.96 SD) of Interobserver and Intraobserver Variability

RadialCircumferential
Peak Systolic Strain %SRe/sPSIPeak Systolic Strain %SRe/sPSI
Interobserver−0.61 ± 7.96−0.32 ± 1.090.04 ± 0.170.20 ± 3.080.03 ± 0.26−0.01 ± 0.07
Intraobserver−0.29 ± 7.52−0.09 ± 0.380.01 ± 0.07−0.06 ± 2.16−0.01 ± 0.370.01 ± 0.04

PSI = post-systolic strain index; SRe = strain rate during early diastole.