title: Efficacy and Optimal Timing of Endovascular Treatment for Type B Aortic Dissection.
abstract: OBJECTIVE
  To determine the efficacy and the optimal timing of thoracic endovascular aortic repair (TEVAR) for closing the primary entry in uncomplicated patients with chronic type B aortic dissection and a patent false lumen (FL).
  
  
  METHODS
  Thirteen patients underwent TEVAR for aortic dissection between 2008 and 2012. These patients had chronic dissection with a patent FL and expansion of the aorta. Early TEVAR was performed for five patients within 1-7 months from the index dissection (TEVAR-EC group) and delayed TEVAR was performed for eight patients within 1-16 years (TEVAR-DC group). Changes in the diameters and volumes of the true lumen (TL) and FL and the aortic remodeling were assessed by multidetector computed tomography for 3 years after TEVAR.
  
  
  RESULTS
  The reduction rate of FL in the thoracic aorta was notably higher in the TEVAR-EC group than in the TEVAR-DC group regardless of the presence or absence of distal retrograde flow. There was a significant TL expansion despite different timings of TEVAR.
  
  
  CONCLUSIONS
  Early TEVAR resulted in good prognosis and preferable aortic remodeling in uncomplicated patients with chronic type B aortic dissection and a patent FL, and we recommend early TEVAR within seven months after the index dissection.
authors.affiliation: Department of Cardiovascular Surgery, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Kinoshita
authors.affiliation: Department of Cardiovascular Surgery, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
authors.forename: Eiki
authors.initials: E
authors.lastname: Fujimoto
authors.affiliation: Department of Cardiovascular Surgery, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Arase
authors.affiliation: Department of Cardiovascular Surgery, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
authors.forename: Hirotsugu
authors.initials: H
authors.lastname: Kurobe
authors.affiliation: Department of Cardiovascular Surgery, The Tokushima Prefectural Hospital, Tokushima, Japan.
authors.forename: Fumio
authors.initials: F
authors.lastname: Chikugo
authors.affiliation: Department of Cardiovascular Surgery, Imabari Daiichi Hospital, Ehime, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Sogabe
authors.affiliation: Department of Cardiovascular Surgery, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Kitaichi
authors.affiliation: Department of Cardiovascular Surgery, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Kitagawa
keywords: aortic remodeling; thoracic endovascular aortic repair; type B aortic dissection; uncomplicated case