Table 2.

Measurements of the mean 3D annular contour (second column), and the range of values obtained by moving along each eigenmode from -2 to +2 standard deviations from the mean.

Annular measurement	Mean model	Range in eigenmode 1	Range in eigenmode 2	Range in eigenmode 3
AC	105.2 mm	77.5 to 133.5 mm	106.5 to 107.7 mm	106.8 to 107.0 mm
AH	7.7 mm	4.5 to 11.2 mm	7.7 to 8.5 mm	3.7 to 11.5 mm
SLD	28.4 mm	22.3 to 34.5 mm	28.2 to 28.9 mm	27.4 to 29.6 mm
ICW	33.0 mm	23.0 to 42.9 mm	31.9 to 34.3 mm	31.8 to 34.1 mm
AHCWR	23.2 %	19.7 to 26.1 %	24.1 to 24.9 %	11.8 to 33.9 %
SLD:ICW	86.3%	97.1 to 80.4 %	88.6 to 84.3 %	86.1 to 87.0 %
PAC:AC	59.7 %	61.9 to 58.4 %	61.7 to 56.3 %	65.1 to 53.4 %

AC = annular circumference, AH = annular height, SLD = septolateral diameter, ICW = intercommissural width, AHCWR = ratio of AH to ICW, SLD:ICW = ratio of SLD to ICW, PAC:AC = ratio of posterior AC to total AC