Table 4 Comparison ascending aortic flow pattern parameters before and after valve replacement

Number

10

10

6

6

Absolute rotational flow (mm²/ms)

30.4 ± 16.3

7.3 ± 4.1

p = 0.001

35.6 ± 23.1

22.2 ± 6.0

p = 0.18

Systolic WSS_circavg (N/m²)

1.02 ± 0.21

0.68 ± 0.21

p = 0.001

1.04 ± 0.20

0.70 ± 0.21

p = 0.048

Absolute systolic in-plane WSS (N/m²)

0.47 ± 0.20

0.20 ± 0.13

p = 0.001

0.56 ± 0.32

0.44 ± 0.19

p = 0.41

Max systolic through-plane WSS (N/m²)

1.43 ± 0.54

0.92 ± 0.39

p = 0.04

1.47 ± 0.34

0.75 ± 0.21

p = 0.01

RA-LP systolic WSS_circavg (N/m²)

0.55 ± 0.66

0.28 ± 0.23

p = 0.19

0.77 ± 0.29

0.25 ± 0.27

p = 0.03

Systolic flow angle (°)

26.5 ± 9.3

17.1 ± 9.8

p = 0.77

23.8 ± 9.4

20.2 ± 7.2

p = 0.41

Normalised flow displacement

0.126 ± 0.093

0.069 ± 0.065

p = 0.18

0.166 ± 0.053

0.141 ± 0.068

p = 0.54

Peak velocity (m/s)

3.4 ± 1.5

2.0 ± 0.5

p = 0.02

3.7 ± 0.8

2.1 ± 0.4

p = 0.001

Regurgitant fraction (%)

38 ± 19

3 ± 2

p < 0.001

12 ± 14

2 ± 2

p = 0.21

Left ventricular ejection fraction (%)

71 ± 9

68 ± 16

p = 0.68

75 ± 9

75 ± 5

p = 0.91