Table 2

Dimensions of the LAA ostium determined by TOE with and without UCA in different standard views (N=223)

Without UCAWith UCAP value
 Diameter (mm)19.4 ± 5.220.2 ± 4.80.056
 Max. depth (mm)25.1 ± 7.125.0 ± 5.90.546
 Orthogonal depth (mm)21.4 ± 5.821.3 ± 5.50.603
 Area (mm2)385.3 ± 142.3391.7 ± 126.10.772
45°
 Diameter (mm)19.0 ± 4.218.7 ± 3.90.352
 Max. depth (mm)23.9 ± 5.524.3 ± 5.30.359
 Orthogonal depth (mm)19.4 ± 4.819.8 ± 4.60.257
 Area (mm2)358.3 ± 118.9374.3 ± 109.70.025
90°
 Diameter (mm)18.8 ± 4.319.0 ± 4.10.378
 Max. depth (mm)25.5 ± 6.024.4 ± 5.10.010
 Orthogonal depth (mm)20.3 ± 5.619.9 ± 4.80.309
 Area (mm2)391.2 ± 121.8389.5 ± 108.30.879
135°
 Diameter (mm)19.3 ± 5.519.1 ± 5.00.700
 Max. depth (mm)22.5 ± 5.922.7 ± 5.60.650
 Orthogonal depth (mm)20.9 ± 5.921.1 ± 5.80.602
 Area (mm2)364.2 ± 113.3379.1 ± 112.40.039
  • LAA, left atrial appendage closure; P, level of significance (paired t-test); TOE, transoesophageal echocardiography; UCA, ultrasound contrast agent.