title: Intermediate to long-term outcomes of endoluminal stent-graft repair in patients with chronic type B aortic dissection.
abstract: OBJECTIVE
  To assess mid- to long-term clinical results of stent-graft repair in patients with type B aortic dissection.
  
  
  METHODS
  Retrospective analysis was done on 72 patients (47 men; mean age 55+/-12 years) who were diagnosed with chronic type B aortic dissection and underwent stent-graft repair from June 1994 to December 2007. Two types of stent-grafts were employed. Prior to 2000, a custom-designed stent-graft composed of self-expanding Z-type stainless steel stents covered with woven polytetrafluoroethylene material was used. Thereafter, a separate-type (modular) manufactured stent-graft was used, consisting of proximal and distal nitinol stents with an unsupported Dacron tube graft in between; the unsupported graft was stented after deployment.
  
  
  RESULTS
  Procedural success (completion of the stent-graft deployment at the target area without device failure) was obtained in 97% (70/72). The 2 failures were due to stent migration and tortuous anatomy, respectively. There were persistent type I endoleaks in 6 cases for a clinical success (entry tear exclusion) of 88% (64/72). There was no immediate postprocedural mortality or paraplegia. There was unintended partial left subclavian artery occlusion in 1 case, as well as postprocedural transient renal failure in 1 patient and 2 access-site pseudoaneurysms. Median follow-up was 43 months (range 5-97, mean 64.4+/-38.8) in 61 patients (3 patients lost to follow-up). Five patients died, 1 of probable aortic rupture in the setting of residual type I endoleak. Overall clinical success (no death, conversion, or endoleak) was achieved in 84% (47/56); of these, 35 (74%) showed complete resolution of the thoracic false lumen, while the other 12 (26%) had a decrease in false lumen diameter.
  
  
  CONCLUSIONS
  Intermediate to long-term results of stent-graft implantation in patients with chronic type B aortic dissection seem acceptable and may justify the use of this minimally invasive approach as first line therapy in these patients.
authors.affiliation: Division of Cardiology, Yonsei University College of Medicine, Seoul, Republic of Korea.
authors.forename: Ung
authors.initials: U
authors.lastname: Kim
authors.forename: Sung-Jin
authors.initials: SJ
authors.lastname: Hong
authors.forename: Jaedeok
authors.initials: J
authors.lastname: Kim
authors.forename: Jung-Sun
authors.initials: JS
authors.lastname: Kim
authors.forename: Young-Guk
authors.initials: YG
authors.lastname: Ko
authors.forename: Donghoon
authors.initials: D
authors.lastname: Choi
authors.forename: Do Yun
authors.initials: DY
authors.lastname: Lee
authors.forename: Byung-Chul
authors.initials: BC
authors.lastname: Chang
authors.forename: Won-Heum
authors.initials: WH
authors.lastname: Shim
mesh_terms: D000328:Adult; D000368:Aged; D000784:Aortic Dissection / Q000401:mortality / Q000601:surgery*; D017545:Aortic Aneurysm, Thoracic / Q000401:mortality / Q000601:surgery*; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000009:adverse effects / Q000295:instrumentation* / Q000401:mortality; D002908:Chronic Disease; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D011093:Polyethylene Terephthalates; D011138:Polytetrafluoroethylene; D011474:Prosthesis Design; D012189:Retrospective Studies; D015607:Stents; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D011093:Polyethylene Terephthalates; D011138:Polytetrafluoroethylene