title: Fate of the aortic valve after root reconstruction in type A aortic dissection: a 20-year follow up.
abstract: OBJECTIVE
  The study aim was to evaluate the fate of the aortic valve after root reconstruction in acute type A aortic dissection.
  
  
  METHODS
  Between 1982 and 2006, a total of 373 consecutive patients underwent emergency surgery for acute type A aortic dissection at the authors' institution. Of these patients, 298 (mean age 63 +/- 11 years; range: 22-85 years) underwent replacement of the supracoronary aorta with root reconstruction. The mean follow up period was 6.9 +/- 5.2 years (range: 2 months to 23 years), and was 98% complete. Aortic valve function was assessed by the incidence of aortic valve reoperation and transthoracic echocardiography.
  
  
  RESULTS
  The 30-day mortality was 27% (82/298). Survival was 80%, 57% and 49% at five, 10 and 15 years, respectively. For survivors at the latest follow up, freedom from moderate or severe aortic regurgitation (AR) was 93%, 84% and 72% at five, 10 and 15 years, respectively. Four patients had severe AR but were not reoperated on. Among 200 patients discharged, 13 (6.5%) were reoperated on for severe AR, with an operative mortality of 15% (n = 2). Freedom from aortic valve replacement was 97%, 92% and 84% at five, 10 and 15 years, respectively. Cox regression analysis identified age < or = 59 years (p = 0.0201) and 'low-volume surgeon' (p = 0.0004) as risk factors for recurrent moderate or severe AR.
  
  
  CONCLUSIONS
  The study results showed that, when the aortic dissection involves the aortic root, supracoronary replacement of the ascending aorta with a root reconstruction allows preservation of the aortic valve in the majority of patients, with a satisfactory long-term outcome.
authors.affiliation: Division of Cardiac Surgery of San Martino University Hospital, Genova, Italy. alessandropiccardo@gmail.com
authors.forename: Alessandro
authors.initials: A
authors.lastname: Piccardo
authors.forename: Tommaso
authors.initials: T
authors.lastname: Regesta
authors.forename: Stefano
authors.initials: S
authors.lastname: Pansini
authors.forename: Angelo Maria
authors.initials: AM
authors.lastname: Dell'Aquila
authors.forename: Giovanni
authors.initials: G
authors.lastname: Concistrè
authors.forename: Luigi
authors.initials: L
authors.lastname: Martinelli
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Passerone
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000784:Aortic Dissection / Q000401:mortality / Q000601:surgery*; D001014:Aortic Aneurysm / Q000401:mortality / Q000601:surgery*; D001021:Aortic Valve / Q000503:physiopathology; D001022:Aortic Valve Insufficiency / Q000453:epidemiology; D005260:Female; D005500:Follow-Up Studies; D019918:Heart Valve Prosthesis Implantation; D006801:Humans; D008297:Male; D008875:Middle Aged; D012086:Reoperation / Q000706:statistics & numerical data; D012307:Risk Factors; D055815:Young Adult