title: Key success factors for thoracic endovascular aortic repair for non-acute Stanford type B aortic dissection.
abstract: OBJECTIVE
  We aimed to determine the key factors associated with successful early and late outcomes after thoracic endovascular aortic repair (TEVAR) for non-acute Stanford type B aortic dissection at our institution.
  
  
  METHODS
  Inpatient and outpatient records were retrospectively reviewed. Patients operated on within 14 days after the onset of acute aortic dissection and those with rupture or malperfusion were excluded.
  
  
  RESULTS
  Forty-five patients (mean age, 55.5 ± 13.1 years; 23-79 years) underwent 53 TEVAR operations for non-acute Stanford type B aortic dissection between 1998 and 2012. Thirty-four patients had a patent false lumen and 19 had an ulcer-like projection (ULP). No early mortality was observed. At late follow-up (7.5 ± 3.9 years) of the 45 patients, survival after the initial TEVAR was 100, 86 and 63%; freedom from aortic reintervention was 87, 73 and 59%; and freedom from open aortic surgery was 89, 84 and 73%, at 1, 5 and 10 years, respectively. Of 15 late deaths, 2 were due to aortic rupture and 2 were operative deaths associated with aortic surgery. Of the 34 patients with patent false lumens before TEVAR, 25 had their descending false lumens thrombosed; of these 25, 16 had remodelling of the descending aorta; and of these 16, 4 had complete obliteration of the false lumen of the entire aorta. By bivariate analysis, the site of the primary entry and age were significantly associated with thrombosis of the descending false lumen, maximum aortic diameter was associated with remodelling of the descending aorta, and absence of abdominal branches arising from the false lumen was associated with complete obliteration of the false lumen of the entire aorta.
  
  
  CONCLUSIONS
  The early results of TEVAR for non-acute Stanford type B aortic dissection were favourable. However, for cases with patent false lumens, complete obliteration of the false lumen of the entire aorta was difficult to achieve. Absence of the primary entry at the outer curvature of the distal aortic arch, younger age, small aortic diameter and absence of the abdominal aortic branches arising from the false lumen were the key success factors.
authors.affiliation: Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan funcorogash@hotmail.com.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Kitamura
authors.affiliation: Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
authors.forename: Shinzo
authors.initials: S
authors.lastname: Torii
authors.affiliation: Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
authors.forename: Norihiko
authors.initials: N
authors.lastname: Oka
authors.affiliation: Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Horai
authors.affiliation: Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
authors.forename: Kouki
authors.initials: K
authors.lastname: Nakashima
authors.affiliation: Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
authors.forename: Keiichi
authors.initials: K
authors.lastname: Itatani
authors.affiliation: Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
authors.forename: Sachi
authors.initials: S
authors.lastname: Koyama
authors.affiliation: Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Hari
authors.affiliation: Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
authors.forename: Haruna
authors.initials: H
authors.lastname: Araki
authors.affiliation: Department of Health Policy and Technology Assessment, National Institute of Public Health, Wako, Saitama, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Sato
authors.affiliation: Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
authors.forename: Kagami
authors.initials: K
authors.lastname: Miyaji
mesh_terms: D000328:Adult; D000368:Aged; D000784:Aortic Dissection / Q000601:surgery*; D017545:Aortic Aneurysm, Thoracic / Q000601:surgery*; D019917:Blood Vessel Prosthesis Implantation / Q000379:methods*; D057510:Endovascular Procedures / Q000379:methods*; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D055815:Young Adult
keywords: Aortic remodelling; Chronic type B aortic dissection; Thoracic endovascular aortic repair