title: Surgical treatment of middle aortic syndrome with Takayasu arteritis or midaortic dysplastic syndrome.
abstract: OBJECTIVE
  Middle aortic syndrome (MAS) is a rare condition characterized by severe stenosis of the distal thoracic or abdominal aorta. The aims of this study are to define the anatomic characteristics of MAS and to review the various surgical methods and their outcomes in terms of long-term durability
  
  
  METHODS
  Ten adult patients were diagnosed with MAS caused by Takayasu arteritis (TA) or midaortic dysplastic syndrome and underwent surgical treatment between July 1992 and January 2013.
  
  
  RESULTS
  The aortic lesions were mostly suprarenal (n = 7) and stenoses were commonly found in the celiac axis (n = 6), SMA (n = 7), and renal artery (n = 6). Indications for operation were uncontrolled hypertension in six patients and lower extremity claudication in four. Eight aortic bypasses, one supraceliac aortic interposition graft, and one bilateral aorto-renal bypass were performed. Adjunctive renal bypass with saphenous vein graft (n = 4) and IMA reimplantation (n = 2) were performed simultaneously. There was no post-operative mortality, and one complication of iliac dissection at the distal anastomosis site was detected and treated by stenting. Hypertension was cured or improved in five of the six patients, and lower extremity claudication improved in all of them. With a median follow up of 60 months (range, 12-263), all the aortic bypasses were patent and one adjunctive renal artery bypass graft with aortic bypass was occluded 29 months post-operatively.
  
  
  CONCLUSIONS
  Aortic bypass for MAS is safe and shows excellent long-term durability. Considering the patients are relatively young with a long life expectancy, aggressive surgical treatment could be beneficial. Lifelong follow up to monitor complications and disease progression is necessary.
authors.affiliation: Department of Surgery, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea.
authors.forename: S M
authors.initials: SM
authors.lastname: Kim
authors.affiliation: Department of Surgery, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea.
authors.forename: I M
authors.initials: IM
authors.lastname: Jung
authors.affiliation: Department of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea.
authors.forename: A
authors.initials: A
authors.lastname: Han
authors.affiliation: Department of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea.
authors.forename: S-I
authors.initials: SI
authors.lastname: Min
authors.affiliation: Department of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea.
authors.forename: T
authors.initials: T
authors.lastname: Lee
authors.affiliation: Department of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea.
authors.forename: J
authors.initials: J
authors.lastname: Ha
authors.affiliation: Department of Surgery, Myongji Hospital, Goyang-si, Gyeonggi-do, Republic of Korea.
authors.forename: S J
authors.initials: SJ
authors.lastname: Kim
authors.affiliation: Department of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea. Electronic address: skminmd@snuh.org.
authors.forename: S-K
authors.initials: SK
authors.lastname: Min
mesh_terms: D000328:Adult; D001012:Aorta, Abdominal / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D001013:Aorta, Thoracic / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D001027:Aortography / Q000379:methods; D001157:Arterial Occlusive Diseases / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*; D019917:Blood Vessel Prosthesis Implantation / Q000009:adverse effects; D003251:Constriction, Pathologic; D005260:Female; D006083:Graft Occlusion, Vascular / Q000209:etiology; D006801:Humans; D006973:Hypertension / Q000209:etiology; D007383:Intermittent Claudication / Q000209:etiology; D008297:Male; D008638:Mesenteric Arteries / Q000601:surgery; D008875:Middle Aged; D012077:Renal Artery / Q000601:surgery; D012092:Replantation; D012189:Retrospective Studies; D012501:Saphenous Vein / Q000637:transplantation*; D013625:Takayasu Arteritis / Q000150:complications* / Q000175:diagnosis; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014654:Vascular Patency; D055815:Young Adult
keywords: Aortic bypass; Middle aortic syndrome; Takayasu arteritis