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. 2013 May 10;15(1):37. doi: 10.1186/1532-429X-15-37

Table 2.

Inter-study reproducibility of LV strain and strain rates

LV parameter Slice Exam 1 Exam 2 Mean difference (SD) ICC SEM SDC
Ecc, %
Base
−14.2
−13.9
−0.2 (1.6)
0.74**
0.8
2.3
Mid
−14.7
−15.2
0.5 (1.9)
0.73**
1.0
2.7
Apex
−15.6
−15.01
−0.6 (1.2)
0.89**
0.4
1.1
Err, %
Base
18.4
19.1
−0.7(5.3)
0.2
4.7
13.1
Mid
16.6
17.1
0.5 (4.1)
0.58*
2.7
7.4
Apex
15.1
13.9
1.2 (6.8)
0.3
5.7
15.8
Lambda 1, %
Base
23.1
24.0
−1.1 (5.2)
0.4*
4.0
11.2
Mid
22.8
23.1
0.3 (5.2)
0.6**
3.3
9.1
Apex
21.2
23.2
2.04 (7.2)
0.47*
5.2
14.5
Lambda 2, %
Base
−16.1
−16.6
0.5 (1.9)
0.66**
1.1
3.1
Mid
−17.2
−17.6
0.4 (2.3)
0.5*
1.6
4.5
Apex
−18.7
−19.4
0.7 (2.8)
0.47*
2.0
5.6
Angle, α
Base
11.4
10.0
1.3 (4.8)
0.05
4.7
13.0
Mid
13.3
12.1
1.1 (5.6)
0.05
5.5
15.1
Apex
16.2
17.2
−0.9 (6.6)
0.06
6.4
17.7
Time to peak Ecc (ms)
Mid
295.8
306
−10.4 (81)
0.4 *
62.7
173.8
SSR (1/s)
Mid
−79.6
−85.1
5.4 (15.7)
0.58*
10.2
28.2
EDSR (1/s) Mid 72.2 70.8 1.4 (43.7) 0.35* 35.2 97.6

SSR systolic circumferential strain rate, EDSR Early diastolic circumferential strain rate.

SD standard deviation of mean difference, ICC Intra-class correlation coefficient, SEM standard error of measurement, SDC Smallest detectable change.

** = p <0.0001, * = p <0.05.