title: Invited commentary.
authors.affiliation: Department of Cardiac Surgery, Children's Hospital Boston, 300 Longwood Ave, Boston, MA 02115, USA. emile.bacha@cardio.chboston.org
authors.forename: Emile A
authors.initials: EA
authors.lastname: Bacha
mesh_terms: D000293:Adolescent; D001021:Aortic Valve; D006348:Cardiac Surgical Procedures / Q000379:methods; D002648:Child; D002675:Child, Preschool; D006349:Heart Valve Diseases / Q000601:surgery*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn