Comparison of eight prosthetic aortic valves in a cadaver model

Number of subjects at each measured annular diameter (n = 66).

Mean deviation of number label from measured annular diameter with standard deviation error bars in 5 mechanical valves (top) and 3 stented tissue valves (bottom). Asterisks indicate statistically significant deviation from the number label compared with the measured annular diameter (n = 66).

Regression analysis for the 3 different valve types: bioprosthetic, supra-annular mechanical, and intra-annular mechanical aortic valves (n = 66). Measured annular area is the largest standard sizer that could fit into the annulus (in square centimeters). Corresponding annular diameter is the diameter of this sizer in millimeters.

Relationship between the geometric orifice area and measured annular area in 3 stented bioprosthetic valves. Lines depict regression analysis (n = 66). Measured annular area is the largest standard sizer that could fit into the annulus (in square centimeters). Corresponding annular diameter is the diameter of this sizer in millimeters.

Relationships between geometric orifice area and measured annular area in 5 mechanical valves. Lines depict regression analysis (n = 66). Measured annular area is the largest standard sizer that could fit into the annulus (in square centimeters). Corresponding annular diameter is the diameter of this sizer in millimeters.