title: Invited commentary.
authors.affiliation: 2D4.37 Walter MacKenzie Health, University of Alberta Hospital, 2D4.37 Walter MacKnezie Health Sciences Centre, 8440 - 112th St, Edmonton, AB, Canada T6G 2B7. El dbross@cha.ab.ca
authors.forename: David B
authors.initials: DB
authors.lastname: Ross
mesh_terms: D063126:Balloon Valvuloplasty / Q000379:methods*; D006330:Heart Defects, Congenital / Q000601:surgery*; D006801:Humans; D018633:Pulmonary Atresia / Q000601:surgery*; D011664:Pulmonary Valve / Q000601:surgery*