Table 5 Interreader variability for all contours combined

Stroke volume

Absolute error [ml]

 − 1 ± 9

0 ± 20

7 ± 12

 − 1 ± 12

Relative error [%]

 − 1 ± 11

0 ± 28

9 ± 15

 − 2 ± 16

ICC

0.920***

0.569*

0.823**

0.809**

Peak flow

Absolute error [ml/s]

 − 7 ± 38

 − 5 ± 100

37 ± 45

1 ± 45

Relative error [%]

 − 2 ± 10

2 ± 32

11 ± 12

1 ± 16

ICC

0.937***

0.565*

0.862**

0.907***

Peak maximum velocity

Absolute error [cm/s]

 − 1 ± 16

14 ± 27

3 ± 28

 − 2 ± 19

Relative error [%]

 − 1 ± 13

12 ± 23

2 ± 19

 − 1 ± 13

ICC

0.705*

0.274

0.359

0.730*

Peak average velocity

Absolute error [cm/s]

2 ± 14

1 ± 17

 − 6 ± 10

2 ± 10

Relative error [%]

2 ± 22

1 ± 22

 − 7 ± 13

3 ± 12

ICC

0.556*

0.304

0.699*

0.754**

Area

Absolute error [mm^2]

 − 18 ± 156

15 ± 192

92 ± 146

82 ± 75

Relative error [%]

 − 6 ± 22

0 ± 30

17 ± 22

 − 6 ± 19

ICC

0.757**

0.605*

0.671*

0.861**

Peak WSS per segment

Absolute error [mPa]

4 ± 190

–

599 ± 718

591 ± 755

Relative error [%]

0 ± 14

–

32 ± 42

18 ± 37

ICC

0.827**

–

0.227

0.480

Peak WSS per contour

Absolute error [mPa]

31 ± 160

50 ± 78

357 ± 513

118 ± 135

Relative error [%]

3 ± 15

10 ± 18

29 ± 52

 − 3 ± 26

ICC

0.857**

0.832**

0.221

0.573*