title: Invited commentary.
authors.affiliation: Children's Hospital Boston, Cardiology Department, 300 Longwood Ave, Boston, MA 02115, USA. james.lock@cardio.chboston.org
authors.forename: James
authors.initials: J
authors.lastname: Lock
authors.forename: Audrey C
authors.initials: AC
authors.lastname: Marshall
mesh_terms: D006348:Cardiac Surgical Procedures; D006325:Heart Atria / Q000473:pathology*; D006346:Heart Septum / Q000473:pathology*; D006801:Humans; D018636:Hypoplastic Left Heart Syndrome / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D007231:Infant, Newborn; D011296:Prenatal Diagnosis