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Table 2 Left ventricular GLS intra- and inter-observer reproducibility

From: Defining the optimal temporal and spatial resolution for cardiovascular magnetic resonance imaging feature tracking

Resolution

Intra-Observer

Inter-observer

Spatial (mm)

Temporal (frames/cycle)

Mean difference (SD of the Diff.)

ICC (95% CI)

CoV (%)

Mean difference (SD of the Diff.)

ICC (95% CI)

CoV (%)

5

20

0.13 (3.11)

0.96 (0.95–0.97)

15.0

0.36 (5.10)

0.87 (0.83–0.90)

24.8

5

30

0.05 (3.36)

0.95 (0.94–0.96)

15.2

0.62 (5.34)

0.86 (0.82–0.89)

24.6

5

40

0.27 (3.00)

0.96 (0.95–0.97)

13.3

0.59 (5.31)

0.86 (0.83–0.89)

24.0

5

50

0.38 (4.55)

0.91 (0.89–0.93)

19.8

0.23 (5.31)

0.87 (0.83–0.90)

23.4

8

20

0.55 (3.31)

0.95 (0.94–0.96)

15.3

0.90 (5.14)

0.86 (0.82–0.89)

24.6

8

30

0.18 (3.26)

0.96 (0.95–0.97)

15.0

0.83 (5.53)

0.86 (0.82–0.89)

26.0

8

40

0.51 (3.43)

0.95 (0.93–0.96)

15.6

0.16 (5.58)

0.85 (0.81–0.88)

25.7

8

50

0.70 (4.48)

0.92 (0.90–0.94)

19.2

0.59 (5.35)

0.88 (0.84–0.90)

23.6

10

20

0.54 (3.57)

0.95 (0.94–0.96)

16.8

0.44 (5.30)

0.89 (0.86–0.91)

25.6

10

30

0.36 (3.72)

0.95 (0.94–0.96)

16.2

0.69 (5.96)

0.87 (0.83–0.90)

26.5

10

40

0.02 (3.64)

0.96 (0.95–0.97)

15.7

0.75 (6.23)

0.86 (0.81–0.89)

27.3

10

50

0.00 (4.37)

0.94 (0.93–0.96)

18.2

1.04 (5.94)

0.88 (0.84–0.91)

25.5

  1. SD standard deviation, Diff difference, ICC intraclass correlation coefficient, CoV coefficient of variation, LV left ventricular, GLS global longitudinal strain (n = 252 data points)