title: Trends in Fontan surgery and risk factors for early adverse outcomes after Fontan surgery: the Australia and New Zealand Fontan Registry experience.
abstract: OBJECTIVE
  This study examined changes in practice and analyzed risk factors for adverse early outcomes after Fontan surgery through use of a binational, population-based registry.
  
  
  METHODS
  Demographic, preoperative, and perioperative data were collected from all participating institutions of the Australia and New Zealand Fontan Registry. Patient and operative characteristics were analyzed with multivariable logistic regression for impact on early mortality, early Fontan failure (death, takedown, or mechanical support), effusions (prolonging hospital stay >30 days or requiring surgical reintervention), and stay longer than 30 days.
  
  
  RESULTS
  Overall mortality was 3.5% (37/1071) and declined throughout the study period, from 8% (1975-1990) to 4% (1991-2000) and 1% (2001-2010). There were no differences between the extracardiac and lateral tunnel modifications for any outcome. After 2006, the extracardiac conduit was performed exclusively, with 1.3% mortality. The proportion of patients with hypoplastic left heart syndrome rose to 17% in the current era, and this group had more effusions (odds ratio, 3.0; 95% confidence interval, 1.4-6.6) and stayed on average 2 days longer in the hospital. Hypoplastic left heart syndrome was also an independent risk factor for composite adverse early outcome (death, failure, prolonged effusions, or prolonged stay >30 days; odds ratio, 2.6; 95% confidence interval 1.4-4.8 respectively).
  
  
  CONCLUSIONS
  The extracardiac conduit is now the exclusive Fontan modification performed in Australia and New Zealand. Even with a higher proportion of high-risk cases, perioperative outcomes are excellent in the modern era. Hypoplastic left heart syndrome confers a higher risk of prolonged pleural effusion and early composite adverse outcome.
authors.affiliation: Cardiac Surgery and Cardiology Departments, Royal Children's Hospital, Melbourne, Australia; Murdoch Childrens Research Institute, Melbourne, Australia. Electronic address: ajayjiyengar@gmail.com.
authors.forename: Ajay J
authors.initials: AJ
authors.lastname: Iyengar
authors.affiliation: Heart Centre for Children, The Children's Hospital at Westmead, Sydney, Australia.
authors.forename: David S
authors.initials: DS
authors.lastname: Winlaw
authors.affiliation: Murdoch Childrens Research Institute, Melbourne, Australia; Department of Mathematics and Statistics, La Trobe University, Melbourne, Australia.
authors.forename: John C
authors.initials: JC
authors.lastname: Galati
authors.affiliation: Department of Cardiology, Royal Prince Alfred Hospital, Sydney, Australia.
authors.forename: David S
authors.initials: DS
authors.lastname: Celermajer
authors.affiliation: Department of Cardiology, Women's and Children's Hospital, Adelaide, Australia.
authors.forename: Gavin R
authors.initials: GR
authors.lastname: Wheaton
authors.affiliation: Green Lane Congenital Cardiac Service, Starship Children's Hospital, Auckland, New Zealand.
authors.forename: Thomas L
authors.initials: TL
authors.lastname: Gentles
authors.affiliation: Department of Cardiology, The Royal Melbourne Hospital, Melbourne, Australia.
authors.forename: Leeanne E
authors.initials: LE
authors.lastname: Grigg
authors.affiliation: Cardiac Surgery and Cardiology Departments, Royal Children's Hospital, Melbourne, Australia; Murdoch Childrens Research Institute, Melbourne, Australia.
authors.forename: Robert G
authors.initials: RG
authors.lastname: Weintraub
authors.affiliation: Children's Cardiac Centre, Princess Margaret Hospital for Children, Perth, Australia.
authors.forename: Andrew
authors.initials: A
authors.lastname: Bullock
authors.affiliation: Paediatric Cardiology, Queensland Paediatric Cardiac Service, Mater Children's Hospital, Brisbane, Queensland, Australia.
authors.forename: Robert N
authors.initials: RN
authors.lastname: Justo
authors.affiliation: Cardiac Surgery and Cardiology Departments, Royal Children's Hospital, Melbourne, Australia; Murdoch Childrens Research Institute, Melbourne, Australia.
authors.forename: Yves
authors.initials: Y
authors.lastname: d'Udekem
mesh_terms: D001315:Australia; D002648:Child; D002675:Child, Preschool; D005260:Female; D018729:Fontan Procedure / Q000009:adverse effects* / Q000401:mortality / Q000639:trends*; D006330:Heart Defects, Congenital / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D006801:Humans; D007902:Length of Stay; D016015:Logistic Models; D008297:Male; D015999:Multivariate Analysis; D009520:New Zealand; D016017:Odds Ratio; D010996:Pleural Effusion / Q000209:etiology; D011183:Postoperative Complications / Q000209:etiology* / Q000401:mortality / Q000601:surgery; D012042:Registries; D012086:Reoperation; D012189:Retrospective Studies; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome