title: Endovascular Reintervention for Failing Infrainguinal Bypass Grafts.
abstract: OBJECTIVE
  Patients with lower extremity bypass grafts that develop stenosis commonly undergo endovascular treatment (EVT) procedures. This study was performed to evaluate the outcomes of EVT procedures for infrainguinal grafts with bypass at risk (BAR).
  
  
  METHODS
  We performed a retrospective review of 24 grafts in 22 patients from July 2010 to June 2016. The demographic information of the patients and the characteristics of lesions were examined, and the outcomes with regard to the patency and survival rates were calculated.
  
  
  RESULTS
  Twenty-four grafts were evaluated; the initial technical success rate of EVT procedure was 91.7%. Sixteen of 24 bypass grafts (66.7%) required multiple EVT procedures due to graft restenosis. Inflow vessels from the superficial femoral artery were associated with significantly higher rates of single EVT procedures (P = 0.0206). At 2 years, the primary, assisted primary, and secondary patency rates were 30.3%, 69.5%, and 78.0%, respectively.
  
  
  CONCLUSIONS
  The EVT procedure is one of the treatment options for the treatment of grafts with BAR and might be associated with an acceptable medium-term patency rate.
authors.affiliation: Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan. Electronic address: igari.srg1@tmd.ac.jp.
authors.forename: Kimihiro
authors.initials: K
authors.lastname: Igari
authors.affiliation: Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Kudo
authors.affiliation: Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Toyofuku
authors.affiliation: Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Inoue
mesh_terms: D000368:Aged; D000800:Angioplasty, Balloon / Q000009:adverse effects; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000009:adverse effects / Q000295:instrumentation*; D005260:Female; D006083:Graft Occlusion, Vascular / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000628:therapy*; D006801:Humans; D053208:Kaplan-Meier Estimate; D035002:Lower Extremity / Q000098:blood supply*; D008297:Male; D008875:Middle Aged; D058729:Peripheral Arterial Disease / Q000601:surgery*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012008:Recurrence; D019233:Retreatment; D012189:Retrospective Studies; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome; D014654:Vascular Patency