Fig. 3
From: Aortic valve replacement in pediatric patients: 30 years single center experience
Freedom from aortic valve re-operation. A Kaplan–Meier estimated freedom from aortic valve re-operation. Curve with 95% confidence interval (CI). B Freedom from aortic valve re-operation in patients with mechanical AVR and biological AVR. Kaplan–Meier estimated freedom from aortic valve re-operation in patients following mechanical AVR versus patients following biological (homograft, bioprosthetic) AVR. AVR, aortic valve replacement