title: Factors affecting primary patency of stenting for TransAtlantic Inter-Society (TASC II) type B, C, and D iliac occlusive disease.
abstract: OBJECTIVE
  The purpose of our study was to evaluate 1- and 2-year results and the influence of risk factors on the outcome in the patients undergoing iliac artery stenting for TASC II type B, C, and D iliac lesions.
  
  
  METHODS
  In this prospective nonrandomized study conducted between April 15, 2011, and April 15, 2013, 316 patients underwent angiography with a diagnosis of aortoiliac atherosclerotic disease. Of these, 62 iliac endovascular procedures (87 stents) were performed in 54 patients.
  
  
  RESULTS
  The indications for revascularization were disabling claudication (Rutherford 2, 5.9%; Rutherford 3, 35.2%), rest pain (Rutherford 4, 22.2%), and gangrene (Rutherford 5, 16.7%). The overall complication rate was 9.2%. The cumulative primary stent patency at 1 and 2 years was 83.0%±5.2% and 79.9%±5.8%, respectively. Early stent thrombosis in ≤30 days was detected in two patients (3.7%). The primary patency rates for the stents ≤61mm at 12 and 24 months were 90.6%±4.5% and 86.6%±5.8%, respectively; those for the stents >61mm were 67.7%±10.9% and 60.2%±12.0%, respectively (P=0.016). The multivariate Cox regression analysis enabled the localization of a stent in both the CIA and the EIA (hazard ratio [HR], 3.3; 95% confidence interval [CI], 1.1-9.5; P=0.021) and poor runoff (HR, 3.2; 95%, CI 1.0-10.0; P=0.047) as independent predictors of decreased stent primary patency.
  
  
  CONCLUSIONS
  The localization of a stent in both iliac (CIA and EIA) arteries and poor runoff significantly reduce the primary stent patency. Patients with stents >61mm have a higher risk of stent thrombosis or in-stent restenosis development.
authors.affiliation: Department of Cardiac, Thoracic and Vascular Surgery, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania. Electronic address: zana.kavaliauskiene@gmail.com.
authors.forename: Zana
authors.initials: Z
authors.lastname: Kavaliauskienė
authors.affiliation: Department of Cardiac, Thoracic and Vascular Surgery, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania; Institute of Cardiology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania.
authors.forename: Rimantas
authors.initials: R
authors.lastname: Benetis
authors.affiliation: Department of Cardiac, Thoracic and Vascular Surgery, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania.
authors.forename: Donatas
authors.initials: D
authors.lastname: Inčiūra
authors.affiliation: Department of Cardiac, Thoracic and Vascular Surgery, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania.
authors.forename: Nerijus
authors.initials: N
authors.lastname: Aleksynas
authors.affiliation: Department of Radiology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania.
authors.forename: Rytis Stasys
authors.initials: RS
authors.lastname: Kaupas
authors.affiliation: Department of Cardiac, Thoracic and Vascular Surgery, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania.
authors.forename: Aleksandras
authors.initials: A
authors.lastname: Antuševas
mesh_terms: D000368:Aged; D001162:Arteriosclerosis Obliterans / Q000503:physiopathology / Q000601:surgery*; D050197:Atherosclerosis / Q000503:physiopathology / Q000601:surgery*; D057510:Endovascular Procedures; D005260:Female; D006801:Humans; D007083:Iliac Artery / Q000503:physiopathology / Q000601:surgery*; D008297:Male; D011446:Prospective Studies; D012307:Risk Factors; D015607:Stents; D016896:Treatment Outcome; D014654:Vascular Patency
keywords: Aortoiliac occlusive disease; Complications; Iliac stenting; Outcomes; TASC II type B, C, D lesions