Table 1 –

Total tissue stretches (${\lambda }_{\mathit{\text{circ}}}^{0-\mathit{\text{peak}}}$ and ${\lambda }_{rad}^{0-\mathit{\text{peak}}}$) and anisotropy index of each region for the MVAL and TVAL leaflets (c.f. Fig. 2 & Fig. 3). Reported values are for equibiaxial testing protocol (T_circ,max:T_rad,max = 1:1). All values are reported as mean ± SEM.

Valve	Region	${\lambda }_{\mathit{\text{circ}}}^{0-\mathit{\text{peak}}}$	${\lambda }_{rad}^{0-\mathit{\text{peak}}}$	Anisotropy Index
MVAL	A (n=13)	1.301±0.043	1.259±0.038	0.977 ± 0.034
	B (n=13)	1.189±0.021	1.280±0.035	1.076 ± 0.018
	C (n=13)	1.250±0.030	1.261±0.030	1.010 ± 0.015
	D (n=12)	1.239±0.029	1.281±0.032	1.036 ± 0.018
	E (n=13)	1.194±0.021	1.317±0.043	1.103 ± 0.030
	F (n=13)	1.224±0.037	1.253±0.034	1.030 ± 0.030
TVAL	A (n=13)	1.380±0.065	1.400±0.035	1.019 ± 0.027
	B (n=13)	1.322±0.033	1.444±0.076	1.086 ± 0.039
	C (n=13)	1.371±0.054	1.362±0.060	0.993 ± 0.021
	D (n=12)	1.358±0.049	1.428±0.080	1.054 ± 0.051
	E (n=13)	1.285±0.035	1.394±0.072	1.083 ± 0.043
	F (n=10)	1.268±0.033	1.288±0.053	1.013 ± 0.020

Variation in the sample size (n) was due to tests in which tissue data was not successfully completely. For example: tissue tearing, testing failure, or dissection in which edge regions were not sufficiently large for biaxial mechanical testing.