Fig. 3

Kaplan-Meier non-parametric estimate of freedom from structural valve degeneration, as defined by a need for reoperation due to valve dysfunction preceding death, in patients with the Carpentier-Edwards Magna valve in the mitral position (N = 70, with n = 2 events, 68 censored). X-axis represents time after valve implant, in months. ^aNumber at risk for each 10 month interval beginning with n of 70