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Probability of first aortic or aortic valve–related reoperation. Solid lines represent parametric estimates enclosed within 68%confidence bands equivalent to ± 1 SE. Symbols are nonparametric Kaplan-Meier estimates with 68%confidence band. A, Stratified by 4 surgical strategies. B, Stratified by root remodeling for bicuspid valves versus reimplantation or remodeling for tricuspid aortic valves.
