Table 4 Paired analysis for the first (mean = 43.1 days; median= 7 days) and second (mean=4.3 years; median= 4.4 years) echocardiography investigations performed after surgery

Aortic root diameter (mm)

N = 7

   First echo post-op

33.4 (2)

30-36

32; 33.7; 35

   Last echo post-op

33.3 (3.1)

29-38

30; 33.5; 3

LVIDd (mm)

N = 10

   First echo post-op

52 (10)

40-68

45.7; 46.4; 62

   Last echo post-op

51 (7.7)

41-64

44; 49; 57

Aortic velocity (m/sg)

N = 13

   First echo post-op

2.1 (0.5)

1.4-3.2

1.6; 2.1;2.5

   Last echo post-op

2.1 (0.7)

0.9-3.8

1.6; 2; 2.3

Aortic max gradient

N = 20

   First echo post-op

18 (10.4)

6-42

10; 15.5; 22.7

   Last echo post-op

16 (12.2)

3.5-59

10.2; 14; 16

Aortic mean gradient

N = 18

   First echo post-op

9.2 (5.2)

3.3-23.3

5.5; 7.8; 11.2

   Last echo post-op

9.7 (6.8)

3-34

6.7; 8; 9.3

Aortic V2 VTI

N = 13

   First echo post-op

32.7 (11.4)

21-62

24; 29; 39.8

   Last echo post-op

38.6 (17)

25-91

28.5; 33; 43.9