title: Invited commentary.
authors.affiliation: Division of Cardiovascular Surgery, Hospital for Sick Children, Toronto, 555 University Ave, Ste 1525, Toronto, ONM5G 1X8, Canada. Electronic address: glen.vanarsdell@sickkids.ca.
authors.forename: Glen
authors.initials: G
authors.lastname: Van Arsdell
mesh_terms: D057791:Cardiac Imaging Techniques; D018729:Fontan Procedure / Q000379:methods*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D011651:Pulmonary Artery / Q000254:growth & development* / Q000601:surgery*; D014683:Vena Cava, Superior / Q000254:growth & development* / Q000601:surgery*