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Table 4 Variability of LV M-mode measurements

From: Transthoracic echocardiography reference values in juvenile and adult 129/Sv mice

  Intra-Observer Inter-Observer
Juvenile Error (%) Observer variation (mm) Error (%) Observer variation (mm)
LVAWd 1.08 ± 6.66 −0.01 ± 0.04 3.05 ± 11.36 0.02 ± 0.06
LVAWs 3.74 ± 5.11 −0.03 ± 0.04 4.88 ± 12.02 0.04 ± 0.10
LVIDd 1.07 ± 3.30 0.03 ± 0.10 0.32 ± 6.29 0.01 ± 0.18
LVIDs 3.11 ± 7.32 0.06 ± 0.16 1.11 ± 14.40 0.02 ± 0.29
LVPWd 1.78 ± 7.11 −0.01 ± 0.04 13.82 ± 27.87 0.07 ± 0.14
LVPWs 0.78 ± 9.52 0.00 ± 0.08 9.15 ± 30.98 0.06 ± 0.20
IVSd 4.96 ± 11.52 0.02 ± 0.04 8.83 ± 24.40 0.05 ± 0.11
IVSs 2.40 ± 13.61 0.00 ± 0.07 2.07 ± 23.71 0.02 ± 0.13
Adult Error (%) Observer Variation (mm) Error (%) Observer Variation (mm)
LVAWd 4.18 ± 8.30 −0.03 ± 0.07 3.24 ± 12.83 0.03 ± 0.10
LVAWs 2.40 ± 8.69 −0.02 ± 0.10 1.70 ± 9.05 0.02 ± 0.10
LVIDd 1.49 ± 3.52 0.05 ± 0.12 −0.43 ± 2.77 −0.02 ± 0.10
LVIDs 1.13 ± 5.56 0.03 ± 0.14 0.57 ± 5.44 0.01 ± 0.15
LVPWd 5.68 ± 7.16 * −0.03 ± 0.04* −5.64 ± 20.58 −0.05 ± 0.19
LVPWs 2.10 ± 6.29 −0.01 ± 0.05 −8.86 ± 21.86 −0.10 ± 0.24
IVSd 2.73 ± 8.55 −0.01 ± 0.04 −2.88 ± 21.07 −0.01 ± 0.09
IVSs 2.04 ± 10.62 0.00 ± 0.06 −0.84 ± 18.54 0.01 ± 0.10
  1. Values are mean ± SD. p = statistical significance. All p > 0.05, except * p = 0.01.
  2. LVAW = Left ventricle anterior wall. LVID = Left ventricle internal diameter. LVPW = Left ventricle posterior wall. IVS = Interventricular septum. -d = In diastole. -s = In systole.