Risk factors for in-stent restenosis after vertebral ostium stenting

Robert A. Taylor, Farhan Siddiq, M. Fareed K. Suri, Coleman O. Martin, Minako Hayakawa, John C. Chaloupka

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


Purpose: To determine whether vascular risk factors, underlying vessel diameter, and/or the type of stent affect restenosis rates for vertebral ostium stents. Methods: A single-center retrospective analysis was conducted of 44 patients (31 men; mean age 61 years, range 32-81) who underwent stenting of 48 ostial lesions in the vertebral arteries between 1999 and 2005. Only patients who underwent angiographic follow-up were included in the analysis. Cox regression analysis was utilized for risk factor association with binary restenosis (≥50% versus <50%). Stent types and stent categories were compared for differences in binary restenosis rates and lumen gain at follow-up angiography. Results: Twenty-three (48%) of 48 lesions had >50% stenosis at a mean follow-up of 7.7 months. Cigarette smoking was associated with higher binary restenosis rates (p=0.025), while hypertension, diabetes, hyperlipidemia, history of neck radiation, and known coronary artery and/or peripheral vascular disease were not. Reduced binary restenosis rates and improved lumen gain were seen in cobalt chromium balloon-expandable stents compared to non-cobalt chromium stents (p=0.002 and p=0.002, respectively), stainless steel balloon-expandable stents (p=0.005 and p=0.005), and the S670 stent (p=0.069 and p=0.069). The size of stent used was not associated with risk of restenosis (p=0.756). Conclusions: Cobalt chromium stents were associated with reduced restenosis, while smoking was associated with increased restenosis risk.

Original languageEnglish (US)
Pages (from-to)203-212
Number of pages10
JournalJournal of Endovascular Therapy
Issue number2
StatePublished - Apr 1 2008


  • Cobalt chromium stent
  • Restenosis
  • Stainless steel stent
  • Vertebral ostial stenosis
  • Vertebrobasilar stroke


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