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Figure 3 Kaplan-Meier Survival Curves Separating Patients by Independent Predictors of Reoperation

(A) Patients in whom the distance in systole between the discrete subaortic stenosis (DSS) and the aortic valve (AoV) was <6 mm were significantly more likely to require reoperation than those with longer distances between the obstruction and the valve. (B) Patients with peak preoperative pressure gradients across the left ventricular outflow tract 60 mm Hg were significantly more likely to require reoperation than those with less severe gradients.