title: Left heart bypass reduces paraplegia rates after thoracoabdominal aortic aneurysm repair.
abstract: BACKGROUND
  The optimal strategy for spinal cord protection during thoracoabdominal aortic aneurysm (TAAA) repair remains unclear. We evaluated the protective effect of left heart bypass (LHB) during repair of extensive TAAAs.
  
  
  METHODS
  During a 12-year period, 710 patients had repair of extent I or II TAAAs. Left heart bypass was used in 312 (43.9%) patients. This group was retrospectively compared with 398 (56.1%) patients who had operations without LHB.
  
  
  RESULTS
  The overall 30-day survival rate was 94.8% (673 patients). In 42 patients, (6.0%) paraplegia or paraparesis developed. In patients with extent I TAAAs, paraplegia and paraparesis rates in LHB (6 of 123, 4.9%) and non-LHB (9 of 246, 3.7%) groups were similar (p = 0.576) despite longer aortic clamp times in the former group. In patients with extent II TAAAs, the LHB group had a lower incidence of paraplegia or paraparesis (9 of 189, 4.8%) compared with the non-LHB group (18 of 137, 13.1%; p = 0.007).
  
  
  CONCLUSIONS
  Left heart bypass reduced the risk of paraplegia and paraparesis in patients who had repair of extent I and II TAAAs.
authors.affiliation: Department of Surgery, Baylor College of Medicine, The Methodist Hospital, Houston, Texas 77030, USA. jcoselli@bcm.tmc.edu
authors.forename: J S
authors.initials: JS
authors.lastname: Coselli
authors.forename: S A
authors.initials: SA
authors.lastname: LeMaire
mesh_terms: D017544:Aortic Aneurysm, Abdominal / Q000601:surgery*; D017545:Aortic Aneurysm, Thoracic / Q000601:surgery*; D018611:Heart Bypass, Left; D006801:Humans; D007511:Ischemia / Q000517:prevention & control*; D010264:Paraplegia / Q000517:prevention & control; D011183:Postoperative Complications / Q000517:prevention & control*; D012039:Regional Blood Flow; D012189:Retrospective Studies; D013116:Spinal Cord / Q000098:blood supply*; D013119:Spinal Cord Injuries / Q000517:prevention & control*; D016896:Treatment Outcome