title: Midterm results of David V valve-sparing aortic root replacement in acute type A aortic dissection.
abstract: BACKGROUND
  The David V valve-sparing aortic root replacement (David V) has been shown to provide excellent long-term valve function and low rates of valve-related complications in the elective treatment of aortic root aneurysms. The safety and durability of the David V in the repair of acute type A aortic dissection (type A) are currently unclear. In this study, the midterm results of David V in the setting of type A aortic dissection were analyzed.
  
  
  METHODS
  From 2005 to 2013, 350 patients underwent surgical repair of type A aortic dissection. Outcomes were analyzed in 43 consecutive patients who received a David V during repair of type A aortic dissection. Patients were followed with annual postoperative echocardiograms. Follow-up was 85% complete, with a mean duration of 40 ± 31 months.
  
  
  RESULTS
  The mean age of these patients was 46 ± 10 years. There were two operative deaths (4.7%), and 93% of patients required a hemiarch replacement (n = 32) or a total arch replacement (n = 8) using hypothermic circulatory arrest. Cusp repairs were performed in 6 (14%) patients; 51% of patients had 3+ or greater preoperative aortic insufficiency (AI), 83% of patients left the operating room with zero AI, and the remainder had 1+ AI or less. No patient in the follow-up period developed endocarditis or required aortic valve replacement. At midterm follow-up, freedom from 2+ AI was 94%, and freedom from aortic valve replacement was 100%.
  
  
  CONCLUSIONS
  The David V can be performed with low morbidity and mortality in young patients presenting with type A aortic dissection who require aortic root replacement. At midterm follow-up, valve function is durable, and the incidence of valve-related complications is low.
authors.affiliation: Division of Cardiothoracic Surgery, Joseph B. Whitehead Department of Surgery, Emory University School of Medicine, Atlanta, Georgia.
authors.forename: Bradley G
authors.initials: BG
authors.lastname: Leshnower
authors.affiliation: Division of Cardiothoracic Surgery, Joseph B. Whitehead Department of Surgery, Emory University School of Medicine, Atlanta, Georgia.
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Myung
authors.affiliation: Division of Cardiothoracic Surgery, Joseph B. Whitehead Department of Surgery, Emory University School of Medicine, Atlanta, Georgia.
authors.forename: LaRonica
authors.initials: L
authors.lastname: McPherson
authors.affiliation: Division of Cardiothoracic Surgery, Joseph B. Whitehead Department of Surgery, Emory University School of Medicine, Atlanta, Georgia. Electronic address: edward.p.chen@emory.edu.
authors.forename: Edward P
authors.initials: EP
authors.lastname: Chen
mesh_terms: D000208:Acute Disease; D000784:Aortic Dissection / Q000601:surgery*; D017545:Aortic Aneurysm, Thoracic / Q000601:surgery*; D001021:Aortic Valve; D006801:Humans; D008875:Middle Aged; D059351:Organ Sparing Treatments / Q000379:methods*; D013997:Time Factors; D016896:Treatment Outcome; D014656:Vascular Surgical Procedures / Q000379:methods