Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13019-016-0412-4/MediaObjects/13019_2016_412_Fig3_HTML.gif)
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