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. 2013 Mar 7;114(10):1451–1459. doi: 10.1152/japplphysiol.01237.2012

Table 2.

Material constants of K+-induced active strain energy function (Eq. 2) in the pressure range of 30–110 mmHg

Animal Heart No. C2, kPa b1 b2 b′ R2 for Tθθactive R2 for Tzz active
1 9.36 0.22 0.44 9.08 0.81 0.75
2 5.19 0.29 0.73 6.65 0.76 0.66
3 4.58 0.20 0.39 10.0 0.82 0.52
4 14.8 0.20 0.32 11.5 0.67 0.73
5 16.8 0.29 0.46 7.29 0.78 0.58
6 4.21 0.18 0.34 11.4 0.81 0.62
Fit of all experimental data of hearts 1–6 7.88 0.24 0.43 8.60 0.93 0.73
Mean ± SE for hearts 1–6 9.17 ± 2.25 0.23 ± 0.02 0.45 ± 0.06 9.33 ± 0.83

Material constants, C2, b1, b2, and b′, are obtained from experimental measurements of intima-media layer of RCA. Tθθactive, active circumferential first Piola-Kirchhoff stresses; Tzz active, active axial first Piola-Kirchhoff stresses.