title: Valve-preserving operation in acute aortic dissection type A.
abstract: BACKGROUND
  The standard treatment in patients with acute aortic dissection type A (AADA) and aortic regurgitation is either supracommissural aortic or composite replacement of ascending aorta and valve. Valve-preserving surgical procedures provide a promising alternative. We retrospectively analyzed midterm results after these different approaches.
  
  
  METHODS
  From October 1995 to December 1999, 52 patients (35 men, 17 women) underwent repair of AADA. Patient ages ranged from 30 to 83 years. Composite replacement was chosen for degenerated aortic valves or prior valve replacement (group A; n = 8). With normal root diameter, supracommissural replacement of the ascending aorta was performed (group B; n = 22). For preexisting root dilatation the aortic root was either remodeled (root diameter 30 to 50 mm, group C; n = 17) or the valve reimplanted within a vascular graft (root diameter more than 50 mm, group D; n = 5).
  
  
  RESULTS
  All patients underwent either proximal (n = 46) or total (n = 6) arch replacement under circulatory arrest. Eight patients (15.4%) died (group A: n = 3; group B: n = 3; group C: n = 2). Freedom from aortic regurgitation of grade 2 or more at 2 years was 100% in groups A and D, 90.9% in group C, and 75% following supracommissural replacement. At 2 years freedom from proximal reoperation was 100% in groups A, C, and D and 84.5% in group B.
  
  
  CONCLUSIONS
  In AADA valve-preserving root replacement leads to improved stability of aortic valve function without an increased operative risk. Midterm results are promising and may show further superiority over supracommissural aortic replacement in the future.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, University Hospitals, Homburg/Saar, Germany.
authors.forename: T P
authors.initials: TP
authors.lastname: Graeter
authors.forename: F
authors.initials: F
authors.lastname: Langer
authors.forename: N
authors.initials: N
authors.lastname: Nikoloudakis
authors.forename: D
authors.initials: D
authors.lastname: Aicher
authors.forename: H J
authors.initials: HJ
authors.lastname: Schäfers
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000784:Aortic Dissection / Q000601:surgery*; D001014:Aortic Aneurysm / Q000601:surgery*; D001021:Aortic Valve / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged