Ratio of peak speed of early filling wave (E
wave) to atrial contraction
wave (A
wave) (A/E ratio) versus age in maze
group and control
group. In maze group, least-squares regression of A/E ratio versus age demonstrated linear relationship with r = -0.72 (p = 0.02). This relationship is predicted by the formula A/E ratio = (-0.013 x age) + 1.07. In control group, A/E ratio had a tendency to correlate positively with age but did not reach significance (r = 0.47, p = 0.28).