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

Table 6 Layer-specific left ventricular longitudinal strain analysis by ventricular level (n = 20)

Variable	Full-thickness	Endocardial-only	Epicardial-only	P Value	Intra-class correlation coefficient(95% confidence interval)
Level-specific longitudinal S (%)
Basal	−18.1 ± 2.1	−18.2 ± 2.0	−16.4 ± 2.0^a	< 0.001	0.90 (0.68–0.93)
Mid	− 18.2 ± 2.4	−18.1 ± 2.4	− 16.7 ± 2.1^b	< 0.001	0.96 (0.86–0.97)
Apical	− 21.6 ± 3.1^c	− 21.3 ± 3.2^c	− 16.8 ± 2.1^b	< 0.001	0.91 (0.23–0.83)
P value	< 0.001	< 0.001	0.09
Level-specific longitudinal SRs (1/s)
Basal	−1.01 ± 0.16	− 1.03 ± 0.15	−0.97 ± 0.16^a	0.06	0.92 (0.82–0.96)
Mid	−0.99 ± 0.14	− 1.00 ± 0.14	−0.91 ± 0.11^a	< 0.001	0.96 (0.86–0.97)
Apical	− 1.21 ± 0.26^c	−1.20 ± 0.16^c	−0.95 ± 0.16^b	< 0.001	0.87 (− 0.11–0.75)
P value	< 0.001	< 0.001	0.07

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