title: Comparison of late post-operative cardiopulmonary responses in the Fontan versus ventricular septation for double-inlet left ventricular repair.
abstract: Ventricular septation (VS) and the Fontan procedure are alternatives for definitive repair in patients with double-inlet left ventricle; although VS is theoretically preferable, the current preference in practice is the Fontan procedure. However, the long-term outcomes of both procedures remain unclear. To address this issue, cardiopulmonary responses during exercise were measured in patients with double-inlet left ventricle, and the impact of the type of procedure performed, Fontan or VS, on long-term exercise capacity and late postoperative clinical profiles was assessed. Fourteen post-Fontan patients (mean age 17+/-6 years) and 13 VS patients (mean age 19+/-4 years) underwent exercise testing. Of the 13 VS patients, 5 required atrioventricular valve replacement (AVVR), and 7 required pacemaker implantation. Although no difference in peak oxygen uptake was found between the VS and Fontan patients, peak oxygen uptake was higher in VS patients without AVVR (30+/-8 ml/kg/min) than in VS patients with AVVR (19+/-1 ml/kg/min) and Fontan patients (22+/-6 ml/kg/min) (p<0.01). There was no significant difference in peak oxygen uptake between the VS patients with and without pacemaker implantation (p=0.09). The clinical profiles of the VS and Fontan patients were similar in terms of medication and freedom from tachyarrhythmias or reoperations during the follow-up period. In conclusion, the data suggest that VS without AVVR provides excellent future exercise capacity in selected patients with double-inlet left ventricle.
authors.affiliation: Department of Pediatrics, National Cardiovascular Center, Osaka, Japan. hohuchi@hsp.ncvc.go.jp
authors.forename: Hideo
authors.initials: H
authors.lastname: Ohuchi
authors.forename: Kenichi
authors.initials: K
authors.lastname: Watanabe
authors.forename: Kanako
authors.initials: K
authors.lastname: Kishiki
authors.forename: Masaki
authors.initials: M
authors.lastname: Nii
authors.forename: Yuko
authors.initials: Y
authors.lastname: Wakisaka
authors.forename: Toshikatsu
authors.initials: T
authors.lastname: Yagihara
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Echigo
mesh_terms: D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D002648:Child; D005080:Exercise Test; D005500:Follow-Up Studies; D018729:Fontan Procedure / Q000009:adverse effects*; D006321:Heart / Q000502:physiology*; D006330:Heart Defects, Congenital / Q000601:surgery*; D006801:Humans