title: Open surgical repair for chronic type B aortic dissection: a systematic review.
abstract: BACKGROUND
  The treatment of chronic type B aortic dissection (CBAD) remains complicated. Thoracic endovascular aortic repair (TEVAR) has supplanted open surgical repair (OSR) as the preferred surgical treatment for CBAD. Despite TEVAR's superior short-term results, much less is understood about its long-term outcomes. As much of the understanding of OSR originates from historical report, contemporary series, with modern surgical techniques and technologies, may present an alternative to TEVAR. The present systematic review will assess the short- and long-term outcomes of historic and contemporary series of OSR for CBAD.
  
  
  METHODS
  Electronic searches were performed using six databases from their inception to March 2014. Relevant studies with OSRs for chronic type B dissection were identified. Data were extracted by two independent reviewers and analyzed according to predefined clinical endpoints. Studies were sub-classified into the pre-endovascular (historic series) and endovascular era (contemporary series) depending on whether the majority of cases were performed after 1999.
  
  
  RESULTS
  Nineteen studies were identified for inclusion for quantitative analysis. Pooled short-term mortality was 11.1% overall, and 7.5% in the nine contemporary studies. Stroke, spinal cord ischemia, renal dysfunction, and reoperation for bleeding were 5.9%, 4.9%, 8.1%, and 8.1%, respectively, for the contemporary series. Absolute late reintervention was identified in 13.3% of patients overall, and in 11.3% of patients in the contemporary series. Aggregated survival at 1-, 3-, 5-, and 10-years of all patients were 82.1%, 74.1%, 66.3%, and 50.8%, respectively.
  
  
  CONCLUSIONS
  OSR for chronic type B dissection in the contemporary era offers acceptable results. Management approaches should be considered carefully, taking into account both short-term and long-term complications. More research is required to clarify specific indications for OSR and TEVAR in chronic type B dissections.
authors.affiliation: 1 The Collaborative Research (CORE) Group, Macquarie University, Sydney, Australia ; 2 Department of Cardiothoracic Surgery, Royal Prince Alfred Hospital, Sydney, Australia.
authors.forename: David H
authors.initials: DH
authors.lastname: Tian
authors.affiliation: 1 The Collaborative Research (CORE) Group, Macquarie University, Sydney, Australia ; 2 Department of Cardiothoracic Surgery, Royal Prince Alfred Hospital, Sydney, Australia.
authors.forename: Ramesh P
authors.initials: RP
authors.lastname: De Silva
authors.affiliation: 1 The Collaborative Research (CORE) Group, Macquarie University, Sydney, Australia ; 2 Department of Cardiothoracic Surgery, Royal Prince Alfred Hospital, Sydney, Australia.
authors.forename: Tom
authors.initials: T
authors.lastname: Wang
authors.affiliation: 1 The Collaborative Research (CORE) Group, Macquarie University, Sydney, Australia ; 2 Department of Cardiothoracic Surgery, Royal Prince Alfred Hospital, Sydney, Australia.
authors.forename: Tristan D
authors.initials: TD
authors.lastname: Yan
keywords: Open surgical repair (OSR); chronic type B dissection; descending aorta; thoracic endovascular aortic repair (TEVAR)