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Table 2 Viscoelastic properties of normal chordae under sinusoidally varying load across a range of frequencies

From: Effect of glutaraldehyde based cross-linking on the viscoelasticity of mitral valve basal chordae tendineae

Frequency (Hz)

Anterior strut

Anterior basal

Posterior basal

Storage modulus (MPa)b

Loss modulus (MPa)

Storage modulus (MPa)a

Loss modulus (MPa)

Storage modulus (MPa)a

Loss modulus (MPa)

Mean

SD

Mean

SD

Mean

SD

Mean

SD

Mean

SD

Mean

SD

0.50

52.3

19.9

2.60

1.24

108

44.5

5.78

3.96

109

31.5

5.47

2.95

1.00

53.6

20.7

2.77

1.33

110

45.5

6.04

4.14

111

32.7

5.70

3.07

1.20

54.2

20.8

2.79

1.33

111

46.1

6.04

4.14

112

33.0

5.67

3.06

3.50

56.2

22.2

2.88

1.39

115

47.8

6.14

4.25

116

34.9

5.70

3.09

5.00

57.0

22.7

2.84

1.36

116

48.6

6.03

4.16

117

35.4

5.63

3.07

7.00

57.5

22.9

2.97

1.43

117

48.9

6.25

4.31

118

36.2

5.77

3.13

10.0

58.4

23.6

2.95

1.42

118

49.9

6.10

4.20

119

37.0

5.68

3.06

  1. n = 8
  2. SD standard deviation
  3. The letters a, b are used to identify significant differences for storage modulus. If two chordal types do not share a letter, they are significantly different (p < 0.05) across all frequencies tested; note no significant difference was detected for loss modulus across chordal categories (p > 0.05)