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Table 2 Left atrial strain measured by different observers (mean ± SD, n = 64)

From: Left atrial strain reproducibility using vendor-dependent and vendor-independent software

  Sct(%) Scd(%) Sr(%)
VSSLV
 A1 −11.52 ± 2.69 −16.96 ± 7.28 28.49 ± 7.82
 A2 − 11.14 ± 2.37* −16.71 ± 7.10 27.85 ± 7.65*
 B − 11.12 ± 2.60# −16.63 ± 7.24 27.75 ± 7.77
 Mean − 11.26 ± 2.46 − 16.77 ± 7.06 28.03 ± 7.58
P 0.004 0.244 0.007
VISLV
 A1 −14.54 ± 3.72 −23.35 ± 10.63 37.89 ± 11.89
 A2 −14.64 ± 3.67 −22.81 ± 9.95 37.46 ± 10.83
 B −15.14 ± 3.99 −24.21 ± 10.58 39.35 ± 11.58
 Mean − 14.77 ± 3.59 − 23.17 ± 10.33 38.23 ± 10.99
P 0.610 0.109 0.261
VISLA
 A1 − 14.90 ± 4.13 − 23.72 ± 10.83 38.62 ± 12.19
 A2 −14.72 ± 4.03 − 23.73 ± 10.57 38.45 ± 11.69
 B −14.77 ± 3.83 − 24.36 ± 10.95 39.13 ± 11.77
 Mean −14.80 ± 3.88 − 23.94 ± 10.49 38.73 ± 11.56
P 0.264 0.967 0.607
  1. When using VSSLV, there were significant differences in intra-observer measurement of Sct and Sr, and inter-observer measurement of Sct (p < 0.05). Comparing VISLV and VISLA, there were no significant differences in intra-observer or inter-observer measurements (p > 0.05)
  2. A1: First measurement made by observer A
  3. A2: Second measurement made by observer A 1 month later
  4. B: First measurement made by observer B
  5. #Inter-observer comparison of VSSLV, VISLV, and VISLA (p < 0.05)
  6. *Intra-observer comparison of VSSLV, VISLV, and VISLA (p < 0.05)