Fig. 3.
(A) Piece-wise least-squares linear regression fit of regurgitant fraction (with respect to baseline regurgitation) versus percent annular dilation: G = 0 when d < 25.6; G = 2.5*d – 64 when d ≥ 25.6 (R2 = 0.90), where d is the percent dilation and G is the regurgitant fraction increase from baseline. (B) Composites of primary and secondary chordal forces (with respect to baseline forces) versus percent annular dilation. Least-squares linear regression fit with annular dilation lower than the 25.6% dilation threshold: equation.