Table 2 Diameters and predicted device sizes.

From: Pre-procedural determination of device size in left atrial appendage occlusion using three-dimensional cardiac computed tomography

Diameter

Measurements and device size prediction

Prediction accuracy

Ostium (mm)

Landing zone (mm)

Predicted device size (mm)

Mean error* (mm)

Mean absolute error† (mm)

Minimal

25.1 ± 5.8

22.1 ± 4.5

22.2 ± 4.3

− 4.9 ± 3.3

5.0 ± 3.1

Maximal

35.6 ± 5.9

29.0 ± 5.0

28.1 ± 3.8

1.0 ± 2.9

2.1 ± 2.2

Average

30.4 ± 5.7

25.5 ± 4.3

25.5 ± 4.1

− 1.6 ± 2.6

2.1 ± 2.2

Area-derived

30.1 ± 5.7

25.3 ± 4.3

25.0 ± 4.2

− 2.0 ± 2.6

2.4 ± 2.3

Perimeter-derived

30.9 ± 5.7

26.3 ± 4.3

26.3 ± 3.9

− 0.8 ± 2.4

1.6 ± 1.9

  1. Data are reported as means ± SDs.
  2. *The mean of the differences between predicted device size and actual device size.
  3. †The mean of the absolute differences between predicted device size and actual device size.
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