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Table 2 Analysis of wall shear stress in patients with sinus prosthesis, tube prosthesis and healthy subjects

From: 4D flow CMR analysis comparing patients with anatomically shaped aortic sinus prostheses, tube prostheses and healthy subjects introducing the wall shear stress gradient: a case control study

WSSavg

Pat SP

Pat TP

Healthy

p

p

Mean ± SD

95% CI

Mean ± SD

95% CI

Mean ± SD

95% CI

all

SP vs. TP

Healthy vs. SP

Healthy vs. TP

Bulb

0.85 ± 0.35

0.64; 1.06

0.96 ± 0.37

0.66; 1.25

0.92 ± 0.23

0.79; 1.05

0.79

0.53

0.56

0.80

Aao

0.57 ± 0.13

0.49; 0.65

0.82 ± 0.28

0.59; 1.05

0.60 ± 0.12

0.53; 0.66

0.05

0.02

0.61

0.03

dAAo

0.56 ± 0.13

0.48; 0.63

0.59 ± 0.16

0.46; 0.72

0.65 ± 0.15

0.57; 0.73

0.36

0.66

0.13

0.39

AA

0.52 ± 0.13

0.45; 0.60

0.50 ± 0.23

0.32; 0.68

0.64 ± 0.11

0.57; 0.70

0.06

0.82

0.03

0.10

DD

0.51 ± 0.16

0.42; 0.61

0.53 ± 0.13

0.42; 0.64

0.59 ± 0.15

0.51; 0.67

0.45

0.82

0.25

0.38

DAo

0.68 ± 0.23

0.55; 0.81

0.68 ± 0.18

0.53; 0.83

0.65 ± 0.12

0.59; 0.72

0.97

0.99

0.72

0.70

max. WSSseg

Pat SP

Pat TP

Healthy

p

p

Mean ± SD

95% CI

Mean ± SD

95% CI

Mean ± SD

95% CI

all

SP vs. TP

Healthy vs. SP

Healthy vs. TP

Bulb

1.19 ± 0.40

0.95; 1.43

1.73 ± 0.95

0.97; 2.49

1.17 ± 0.28

0.79; 1.05

0.58

0.11

0.88

0.07

Aao

0.97 ± 0.25

0.83 ± 1.12

1.83 ± 1.02

1.01; 2.26

0.82 ± 0.15

0.74; 0.90

0.03

0.02

0.61

0.03

dAAo

0.98 ± 0.28

0.81; 1.14

1.16 ± 0.40

0.84; 1.48

0.92 ± 0.16

0.82; 1.01

0.20

0.25

0.52

0.07

AA

0.80 ± 0.18

0.69; 0.90

0.80 ± 0.38

0.49; 1.10

0.84 ± 0.15

0.76; 0.93

0.08

0.99

0.53

0.71

DD

0.75 ± 0.29

0.58; 0.93

0.75 ± 0.19

0.60; 0.90

0.80 ± 0.15

0.72; 0.89

0.61

0.97

0.61

0.48

DAo

0.86 ± 0.27

0.71; 1.02

0.94 ± 0.19

0.79; 1.10

0.83 ± 0.12

0.76; 0.89

0.36

0.49

0.67

0.32

WSS gradient

Pat SP

Pat TP

Healthy

p

p

Mean ± SD

95% CI

Mean ± SD

95% CI

Mean ± SD

95% CI

all

SP vs. TP

Healthy vs. SP

Healthy vs. TP

Bulb

0.75 ± 0.25

0.61; 0.89

1.43 ± 0.90

0.70; 2.15

0.56 ± 0.12

0.49; 0.62

< 0.01

0.03

0.02

< 0.01

Aao

0.79 ± 0.23

0.65; 0.93

1.64 ± 1.04

0.80; 2.47

0.47 ± 0.18

0.37; 0.57

< 0.01

0.02

< 0.01

< 0.01

dAAo

0.76 ± 0.31

0.58; 0.94

1.01 ± 0.30

0.77; 1.25

0.47 ± 0.11

0.40; 0.53

< 0.01

0.10

0.01

< 0.01

AA

0.54 ± 0.18

0.43; 0.64

0.52 ± 0.35

0.23; 0.80

0.37 ± 0.13

0.30; 0.44

0.07

0.88

0.02

0.02

DD

0.56 ± 0.27

0.41; 0.72

0.57 ± 0.19

0.42; 0.72

0.45 ± 0.15

0.36; 0.53

0.42

0.97

0.20

0.13

DAo

0.37 ± 0.19

0.26; 0.49

0.5 ± 0.21

0.34; 0.67

0.31 ± 0.06

0.27; 0.35

0.05

0.18

0.29

0.01

min. WSSseg

Pat SP

Pat TP

Healthty

p

p

Mean ± SD

95% CI

Mean ± SD

95% CI

Mean ± SD

95% CI

all

SP vs. TP

Healthy vs. SP

Healthy vs. TP

Bulb

0.44 ± 0.36

0.23; 0.56

0.30 ± 0.16

0.18; 0.43

0.61 ± 0.21

0.49; 0.73

0.38

0.31

0.18

< 0.01

Aao

0.23 ± 0.10

0.17; 0.28

0.19 ± 0.17

0.05; 0.33

0.35 ± 0.18

0.24; 0.45

0.07

0.60

0.06

0.07

dAAo

0.22 ± 0.12

0.15; 0.29

0.15 ± 0.11

0.06; 0.24

0.45 ± 0.15

0.36; 0.54

< 0.01

0.25

< 0.01

< 0.01

AA

0.26 ± 0.15

0.18; 0.35

0.28 ± 0.23

0.09; 0.46

0.47 ± 0.11

0.41; 0.53

0.01

0.85

< 0.01

0.02

DD

0.24 ± 0.10

0.18; 0.30

0.22 ± 0.09

0.15; 0.29

0.36 ± 0.19

0.25; 0.46

0.09

0.65

0.08

0.07

DAo

0.49 ± 0.28

0.33; 0.65

0.44 ± 0.20

0.28; 0.60

0.52 ± 0.13

0.44; 0.59

0.37

0.66

0.77

0.30

  1. Values for all investigated wall shear stress (WSS) parameters at six measurement contours in the aorta are given. Results of all three groups were tested for significance using Kruskal-Wallis-Test (all). In the column on the far right all three groups were tested in pairs, employing Man-Whitney-U-Test (SP vs. TP, SP vs. Healthy, TP vs. Healthy, respectively). Significant differences are marked in bold type
  2. Aortic bulb [bulb]; ascending aorta (AAo); distal ascending aorta (dAAo); aortic arch (AA); ductus diverticulum (DD); descending aorta (DAo); SP sinus prosthesis; TP tube prosthesis