title: [Pulmonary outflow tract reconstruction with autologous tissue during the Ross procedure: right ventricular characteristics in mid-term follow-up].
abstract: BACKGROUND
  The Ross procedure requires the interposition of prosthetic or homograft extracardiac conduits to establish ventricle-pulmonary artery connection (RV-PA). These materials usually require multiple reoperations because of conduit failure. To avoid the re-replacement of currently available conduits, usage of autologous tissue may be preferable to reconstruct RV-PA connection during the Ross procedure, especially in the pediatric age group.
  
  
  METHODS
  Ten patients (mean age 8.7 years, range 2-23) with congenital aortic valve disease underwent the Ross procedure between June, 1996 and July, 1998. To establish RV-PA continuity, autologous aortic wall including aortic valve with a gusset of pericardial tissue was used in six patients, rolled pericardial conduit with fresh pericardial bicuspid valve in three and one direct anastomosis of pulmonary posterior wall onto the right ventricle with a fresh pericardial monocusp valved patch. All patient's postoperative courses were uneventful. All patients were followed up (mean follow-up period: 21.6 +/- 6.6 months) and postoperative right ventricular characteristics, cardio-thoracic ratio (CTR) on chest X-ray and pulmonary valve function were evaluated.
  
  
  RESULTS
  Postoperative right ventricular end-diastolic volume, right ventricular ejection fraction and right ventricular end-diastolic pressure did not change significantly (RVEDV: 128 to 113% of normal, RVEF: 56.4 to 51.5%, RVEDP: 5.9 to 10.1 mmHg). Pulmonary regurgitation during follow-up was mild in six patients and moderate in four. However, CTR decreased significantly over time (preop.: 56.5% postop.: 58.5%, late period: 53.4%).
  
  
  CONCLUSIONS
  Our results support the concept of the reconstruction of pulmonary outflow tract without foreign materials during the Ross procedure. Longer follow-up are necessary to define the possible limitation of this technique.
authors.affiliation: Department of Cardiovascular Surgery, Heart Institute of Japan, Tokyo Women's Medical University, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Shin'oka
authors.forename: Y
authors.initials: Y
authors.lastname: Imai
authors.forename: Y
authors.initials: Y
authors.lastname: Takanashi
authors.forename: K
authors.initials: K
authors.lastname: Seo
authors.forename: M
authors.initials: M
authors.lastname: Terada
authors.forename: M
authors.initials: M
authors.lastname: Aoki
authors.forename: T
authors.initials: T
authors.lastname: Hiramatsu
authors.forename: J
authors.initials: J
authors.lastname: Ohta
authors.forename: J
authors.initials: J
authors.lastname: Kashiwagi
authors.forename: S
authors.initials: S
authors.lastname: Morishima
authors.forename: T
authors.initials: T
authors.lastname: Konuma
mesh_terms: D000328:Adult; D001021:Aortic Valve / Q000601:surgery*; D001022:Aortic Valve Insufficiency / Q000151:congenital / Q000601:surgery; D001024:Aortic Valve Stenosis / Q000151:congenital / Q000601:surgery; D002648:Child; D002675:Child, Preschool; D005500:Follow-Up Studies; D019918:Heart Valve Prosthesis Implantation / Q000379:methods*; D006801:Humans; D011664:Pulmonary Valve / Q000637:transplantation*; D019651:Plastic Surgery Procedures / Q000379:methods*; D013997:Time Factors; D014182:Transplantation, Autologous; D016896:Treatment Outcome; D016278:Ventricular Function, Right