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Table 2 Inter- and intra-observer variability for TomTec and 4DLVQ.

From: Semi-automated quantification of left ventricular volumes and ejection fraction by real-time three-dimensional echocardiography

  Inter-observer Intra-observer
  Abs. % Abs. %
EDV     
   4DLVQ [ml] 9.0 ± 5.9 5.9 ± 3.7 7.5 ± 6.2 5.8 ± 4.5
   TomTec [ml] 17* ± 6.3 11 ± 4.5 7.7 ± 7.3 5.5 ± 5.2
ESV     
   4DLVQ [ml] 5.0 ± 3.6 5.6 ± 4.0 5.5 ± 5.6 8.0 ± 7.6
   TomTec [ml] 12* ± 7.7 15 ± 8.8 5.0 ± 5.9 6.0 ± 7.3
EF     
   4DLVQ [%] 2.7 ± 2. 8 5.9 ± 5.8 3.0 ± 2.7 7.1 ± 6.5
   TomTec [%] 3.0 ± 2.1 8.5 ± 6.5 2.1 ± 2.0 4.9 ± 4.4
  1. * Significantly different from 4DLVQ (p < 0.05). EDV, end-diastolic volume; ESV, end-systolic volume; EF, ejection fraction. Abs. values are population mean ± SD of absolute differences between repeated measurements. % values are population mean ± SD of absolute differences of repeated measurements normalized by the average of the two repeated measurements.