Table 4 Intrareader variability for all contours combined

Stroke volume

Absolute error [ml]

0 ± 6

 − 1 ± 18

2 ± 6

0 ± 12

Relative error [%]

1 ± 7

 − 2 ± 26

3 ± 8

0 ± 16

ICC

0.967***

0.648*

0.964***

0.790**

Peak flow

Absolute error [ml/s]

4 ± 27

 − 3 ± 89

26 ± 92

5 ± 41

Relative error [%]

1 ± 7

 − 1 ± 27

8 ± 27

1 ± 11

ICC

0.969***

0.644*

0.663*

0.917***

Peak maximum velocity

Absolute error [cm/s]

 − 1 ± 11

 − 1 ± 28

5 ± 26

 − 2 ±  − 20

Relative error [%]

 − 1 ± 8

 − 1 ± 21

4 ± 19

 − 1 ± 13

ICC

0.883**

0.219

0.348

0.746*

Peak average velocity

Absolute error [cm/s]

 − 1 ± 10

 − 2 ± 17

9 ± 10

3 ± 7

Relative error [%]

 − 1 ± 14

 − 2 ± 21

12 ± 13

4 ± 8

ICC

0.809**

0.394

0.541*

0.839**

Area

Absolute error [mm^2]

15 ± 97

13 ± 190

 − 80 ± 143

 − 21 ± 87

Relative error [%]

3 ± 15

2 ± 29

 − 12 ± 19

 − 4 ± 15

ICC

0.919***

0.705*

0.788**

0.915***

Peak WSS per segment

Absolute error [mPa]

8 ± 133

–

737 ± 847

 − 137 ± 614

Relative error [%]

1 ± 9

–

44 ± 50

 − 5 ± 29

ICC

0.921***

–

0.068

0.677*

Peak WSS per contour

Absolute error [mPa]

14 ± 121

 − 32 ± 54

567 ± 563

 − 12 ± 156

Relative error [%]

2 ± 11

 − 7 ± 12

60 ± 56

 − 1 ± 22

ICC

0.921***

0.944***

0.068

0.706*