title: Clinical outcome of redo operation on aortic root.
abstract: BACKGROUND
  With the increasing use of biologic conduits or bioprosthetic valve, the number of patients who require redo operation on aortic root increased.
  
  
  METHODS
  In the past 22 years, 14 patients underwent redo operation on aortic root. The mean age was 61.9 ± 14.8 years. Previous operations were full root replacement with stentless valve (n = 4), aortic root replacement with subcoronary technique (n = 3) and Bentall operation (n = 7). The operation interval was 5.4 ± 6.4 years. Indication for redo operation included structural valve deterioration (n = 6), prosthetic valve endocarditis (n = 4), perivalvular leakage (n = 2), dilatation of sinus of Valsalva (n = 1) and dehiscence of proximal anastomosis line (n = 1). Mean follow-up period was 5.3 ± 5.2 years.
  
  
  RESULTS
  Present operations were full root replacement with stentless valve (n = 5) and Bentall operation (n = 9). There was one in-hospital death (7.1 %) caused by arrhythmia. Postoperative complications included implantation of permanent pacemaker (n = 3), arrhythmia (n = 2) and re-intubation (n = 1). The 5-year survival was 92.9 ± 6.9%. Freedom from redo aortic operation at 5 years was 100%.
  
  
  CONCLUSIONS
  Redo operation on aortic root can be performed with acceptable in-hospital mortality and good late survival.
authors.affiliation: Department of Cardiovascular Surgery, Kobe City Medical Center General Hospital, 2-1-1 Minatojimaminamimachi, Chuo-ku, Kobe, 650-0047, Japan, naotowakimachi@hotmail.co.jp.
authors.forename: Naoto
authors.initials: N
authors.lastname: Fukunaga
authors.forename: Tadaaki
authors.initials: T
authors.lastname: Koyama
authors.forename: Yasunobu
authors.initials: Y
authors.lastname: Konishi
authors.forename: Takashi
authors.initials: T
authors.lastname: Murashita
authors.forename: Hideo
authors.initials: H
authors.lastname: Kanemitsu
authors.forename: Yukikatsu
authors.initials: Y
authors.lastname: Okada
mesh_terms: D000328:Adult; D000368:Aged; D001013:Aorta, Thoracic / Q000601:surgery*; D001021:Aortic Valve / Q000601:surgery*; D019917:Blood Vessel Prosthesis Implantation; D005260:Female; D005500:Follow-Up Studies; D019918:Heart Valve Prosthesis Implantation; D017052:Hospital Mortality; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D012086:Reoperation; D012189:Retrospective Studies; D015996:Survival Rate; D016896:Treatment Outcome