title: Invited Commentary.
authors.affiliation: Department of Surgery, Yale University School of Medicine, PO Box 208039, New Haven, CT 06520-8039. Electronic address: paul.kirshbom@yale.edu.
authors.forename: Paul
authors.initials: P
authors.lastname: Kirshbom
mesh_terms: D000015:Abnormalities, Multiple; D001021:Aortic Valve / Q000002:abnormalities*; D005260:Female; D006349:Heart Valve Diseases / Q000151:congenital*; D006801:Humans; D018636:Hypoplastic Left Heart Syndrome / Q000601:surgery*; D008297:Male; D008946:Mitral Valve Stenosis / Q000401:mortality*; D058327:Norwood Procedures