title: Endovascular treatment of asymptomatic popliteal aneurysms: 8-year concurrent comparison with open repair.
abstract: OBJECTIVE
  The aim of this prospective comparative study was to compare the results of 8-years experience of endovascular treatment (ET) of popliteal aneurysms (PAs) using the Hemobahn/Viabahn endograft with those achieved with open repair (OR). Endpoints were primary and secondary patency rate.
  
  
  METHODS
  The study was a prospective randomized clinical trial from January 1999 to December 2003 and a prospective comparative study from January 2004 to December 2006. Patients with an asymptomatic aneurismal lesion in the popliteal artery 2 cm at angio-computed tomography were included in the study. Indication for ET was PA (proximal and distal neck length >1 cm); contraindications were: 1) age <50 years; 2) poor distal run-off; 3) contraindication to antiplatelet, anticoagulant or thrombolytic therapy.
  
  
  RESULTS
  Between January 1999 and December 2006, of a total of 42 patients with 48 PA, 27 were treated with OR (group A) and 21 with ET (group B). The primary patency rate was 100% in group A and 80.9% in group B at 12 months and 71.4% and 88.1%, respectively, at 72 months; the secondary patency rate at 72 months was 88.15% and 85.9% in groups A and B, respectively. No statistical differences were observed at the log-rank test. During the entire study period, 3 (14.3%) patients in group B required conversion to open surgery because of endograft occlusion.
  
  
  CONCLUSIONS
  Within the power limitations of this study, ET for asymptomatic PA in patients with suitable anatomy can be considered safe, with long-term results comparable with those of OR.
authors.affiliation: Vascular and Endovascular Section, Department of Cardiac, Thoracic and Vascular Sciences, University of Padua, Padua, Italy. michele.antonello.1@unipd.it
authors.forename: M
authors.initials: M
authors.lastname: Antonello
authors.forename: P
authors.initials: P
authors.lastname: Frigatti
authors.forename: P
authors.initials: P
authors.lastname: Battocchio
authors.forename: S
authors.initials: S
authors.lastname: Lepidi
authors.forename: A
authors.initials: A
authors.lastname: Dall'Antonia
authors.forename: G P
authors.initials: GP
authors.lastname: Deriu
authors.forename: F
authors.initials: F
authors.lastname: Grego
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000783:Aneurysm / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D015901:Angiography, Digital Subtraction; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000009:adverse effects / Q000295:instrumentation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D018579:Patient Selection; D011138:Polytetrafluoroethylene; D011150:Popliteal Artery / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D011446:Prospective Studies; D011474:Prosthesis Design; D015641:Radiography, Interventional; D012501:Saphenous Vein / Q000637:transplantation*; D015607:Stents; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D018616:Ultrasonography, Doppler, Duplex; D014654:Vascular Patency; D014656:Vascular Surgical Procedures / Q000009:adverse effects
chemical_list: D011138:Polytetrafluoroethylene