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Table 1 Ratio of major/minor axes (AL-PM/AP) and non-planar angles by 3D VSAP and direct measurements in pipe cleaners and the mitral annuloplasty rings

From: Mitral valve analysis adding a virtual semi-transparent annulus plane for detection of prolapsing segments

Pipe cleaner

 

Echo with 3D VSAP

 

Direct measurements

 

Number

 

AL-PM/AP Ratio

Non-planar angle

AL-PM/AP Ratio

Non-planar angle

1

 

1.38

139

1.36

139

2

 

1.27

125

1.26

124

3

 

1.52

130

1.45

128

4

 

1.67

90

1.66

91

5

 

1.39

131

1.40

122

6

 

1.21

158

1.53

159

7

 

1.34

132

1.37

128

8

 

1.36

154

1.36

153

9

 

1.45

150

1.43

150

10

 

1.39

146

1.43

146

Annuloplasty rings

 

Echo with 3D VSAP

 

Direct measurements

 

Type

Size

AL-PM/AP Ratio

Non-planar angle

AL-PM/AP Ratio

Non-planar angle

Edwards Physio® I

36 mm

1.49

142

1.46

140

Edwards Physio® II

34 mm

1.30

147

1.34

147

Edwards IMR® ring

30 mm

1.49

171

1.51

170

  1. AL-PM anterolateral-posteromedial diameter, AP anteroposterior diameter, VSAP virtual semi-transparent annulus plane