title: Frequency of abdominal aortic expansion after thoracic endovascular repair of type B aortic dissection.
abstract: OBJECTIVE
  To determine abdominal aortic expansion after thoracic endovascular aortic repair (TEVAR) in patients with aortic dissection type B and 36 months minimum follow-up.
  
  
  METHODS
  Retrospective study of 18 TEVAR patients with follow-up >36 months. Abdominal aortic diameters at celiac trunk (location B) and infrarenal aorta (location C) were recorded on the first and last imaging after TEVAR. False lumen thrombosis was determined at level of endograft (A) and at B and C. Aortic expansion was defined as diameter increase of 5 mm or 15%. Correlation analyses were performed to investigate potential determinants of expansion.
  
  
  RESULTS
  Median follow-up was 75.2 months. Sixteen of 18 patients (88.9%) demonstrated abdominal expansion. Mean expansion was 9.9 ± 6.1 mm at B and 11.7 ± 6.5 mm at C, without a difference between acute and chronic dissections. Critical diameters of 55 mm were reached in two patients treated for chronic dissection (11.1%). Annual diameter increase was significantly greater at locations with baseline diameters >30 mm (2.1 ± 1.1 mm vs. 1.0 ± 0.6 mm, p = 0.009). Baseline diameters were greater in patients with chronic dissections.
  
  
  CONCLUSIONS
  Abdominal aortic expansion can be frequently recognized after TEVAR for aortic dissection type B and occurs independently from thoracic false lumen thrombosis. Clinical significant abdominal aortic expansion may occur more frequently in patients treated with TEVAR for chronic dissection.
authors.affiliation: Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany tim.weber@med.uni-heidelberg.de.
authors.forename: Tim F
authors.initials: TF
authors.lastname: Weber
authors.affiliation: Vascular and Endovascular Surgery, University Hospital Heidelberg, Heidelberg, Germany.
authors.forename: Dittmar
authors.initials: D
authors.lastname: Böckler
authors.affiliation: Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Müller-Eschner
authors.affiliation: Vascular and Endovascular Surgery, University Hospital Heidelberg, Heidelberg, Germany.
authors.forename: Moritz
authors.initials: M
authors.lastname: Bischoff
authors.affiliation: Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany.
authors.forename: Moritz
authors.initials: M
authors.lastname: Kronlage
authors.affiliation: Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany.|Institute for Diagnostic, Interventional and Pediatric Radiology, Inselspital, University Medical Center Bern, Bern, Switzerland.
authors.forename: Hendrik
authors.initials: H
authors.lastname: von Tengg-Kobligk
authors.affiliation: Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany.
authors.forename: Hans-Ulrich
authors.initials: HU
authors.lastname: Kauczor
authors.affiliation: Vascular and Endovascular Surgery, University Hospital Heidelberg, Heidelberg, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Hyhlik-Dürr
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000784:Aortic Dissection / Q000000981:diagnostic imaging / Q000601:surgery*; D001012:Aorta, Abdominal / Q000000981:diagnostic imaging / Q000473:pathology*; D017545:Aortic Aneurysm, Thoracic / Q000000981:diagnostic imaging / Q000601:surgery*; D001027:Aortography / Q000379:methods; D019917:Blood Vessel Prosthesis Implantation / Q000009:adverse effects*; D002908:Chronic Disease; D000072226:Computed Tomography Angiography; D004108:Dilatation, Pathologic; D057510:Endovascular Procedures / Q000009:adverse effects*; D005260:Female; D005858:Germany; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013997:Time Factors; D016896:Treatment Outcome; D066253:Vascular Remodeling
keywords: Aortic dissection; endovascular repair; expansion; follow-up; imaging