Ventricular strain analysis in patients with no structural heart disease using a vendor-independent speckle-tracking software

Table 7 Intra- and inter-observer variability of global full-thickness left ventricular strain

	Intra-class correlation coefficient(95% confidence interval)
Variable	Intra-observer variability	Inter-observer variability
Longitudinal
S	0.998 (0.994–0.999)	0.996 (0.989–0.998)
SRs	0.995 (0.988–0.998)	0.982 (0.956–0.993)
SRe	0.964 (0.913–0.986)	0.994 (0.984–0.997)
Circumferential
S	0.997 (0.994–0.999)	0.993 (0.983–0.997)
SRs	0.994 (0.984–0.997)	0.975 (0.940–0.990)
SRe	0.967 (0.919–0.987)	0.967 (0.919–0.987)
Radial
S	0.857 (0.751–0.933)	0.845 (0.727–0.927)
SRs	0.906 (0.782–0.961)	0.898 (0.818–0.953)
SRe	0.808 (0.668–0.909)	0.871 (0.477–0.918)

Abbreviations: S Systolic strain, SRe Early diastolic strain rate, SRs Systolic strain rate

ISSN: 1471-2261