Table 4 univariate analysis of 3D echo guided defect area and circumfrence versus device parameters using independent sample T test

3D defect area versus device waist area in cm²

2.25

+-

1.53

3.38

+-

2.31

2.854

0.0053

3D defect circumference versus device waist circumference in cm

5.36

+-

1.66

2.07

+-

3.45

11.291

< 0.0001

3D defect area versus left atrial disc area in cm²

2.25

+-

1.53

9.16

+-

4.02

2.181

0.0316

3D defect circumference versus left atrial disc circumference in cm

5.36

+-

1.66

2.25

+-

6.90

12.815

< 0.0001