title: Morphologic outcome after endovascular treatment of complicated type B aortic dissection.
abstract: OBJECTIVE
  To investigate the long-term morphologic changes of the aorta after thoracic endovascular aortic repair (TEVAR) for acute complicated type B aortic dissection and to analyze whether these changes differed between DeBakey class IIIa and IIIb dissections.
  
  
  METHODS
  During the period 1999-2009, 58 patients with acute complicated type B aortic dissection were treated with TEVAR. Seven patients lacked follow-up data, leaving 51 patients-17 patients with DeBakey IIIa aortic dissection and 34 patients with DeBakey IIIa aortic dissection IIIb-for inclusion in the study. Computed tomography scans performed before and after TEVAR were evaluated. Maximum thoracic and abdominal aortic diameters and diameters of the true lumen and false lumen at the level of the maximum aortic diameter in the thorax and abdomen were analyzed as well as degree of thrombosis of the false lumen.
  
  
  RESULTS
  There was an overall significant reduction of the thoracic aortic diameter, increased true lumen diameter, and reduced false lumen diameter (P < .05). Total thrombosis of the false lumen, with or without reintervention, was seen in 53% of all patients, in 41% primarily and in 12% after reintervention. The IIIa group had a higher degree of total false lumen thrombosis. All patients in the IIIb group had total thrombosis of the false lumen along the stent graft.
  
  
  CONCLUSIONS
  Long-term follow-up showed favorable aortic remodeling after TEVAR for acute complicated type B aortic dissection. Total thrombosis of the false lumen occurred more often in patients with DeBakey IIIa aortic dissection compared with patients with DeBakey IIIb aortic dissection.
authors.affiliation: Department of Radiology, Oncology and Radiation Science, Section of Radiology (M.-O.E., L.-G.E., R.N.). Electronic address: mats-ola.eriksson@akademiska.se.
authors.forename: Mats-Ola
authors.initials: MO
authors.lastname: Eriksson
authors.forename: Johnny
authors.initials: J
authors.lastname: Steuer
authors.forename: Anders
authors.initials: A
authors.lastname: Wanhainen
authors.forename: Stefan
authors.initials: S
authors.lastname: Thelin
authors.forename: Lars-Gunnar
authors.initials: LG
authors.lastname: Eriksson
authors.forename: Rickard
authors.initials: R
authors.lastname: Nyman
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000784:Aortic Dissection / Q000000981:diagnostic imaging / Q000601:surgery*; D001013:Aorta, Thoracic / Q000000981:diagnostic imaging / Q000601:surgery*; D017545:Aortic Aneurysm, Thoracic / Q000000981:diagnostic imaging / Q000601:surgery*; D001027:Aortography / Q000379:methods; D019917:Blood Vessel Prosthesis Implantation; D057510:Endovascular Procedures; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D013927:Thrombosis / Q000000981:diagnostic imaging; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
keywords: LSA; TEVAR; left subclavian artery; thoracic endovascular aortic repair