Iliac artery stenoses after percutaneous transluminal angioplasty: Follow-up with duplex ultrasonography

Purpose: To assess iliac artery stenosis before and up to 1 year after percurtaneous transluminal angioplasty (PTA) with duplex ultrasound (DUS) to determine the incidence of residual and recurrent stenoses and correlate these findings to clinical outcome.Patients and Methods: Sixty-one patients with 70 iliac artery segments treated with PTA were examined. The peak systolic velocity (PSV) ratio (PSV ratio=PSV in stenosis ÷PSV proximal or distal to stenosis) was determined by DUS before PTA and 1 day, 3 months and 1 year after PTA. Three categories of results were identified by using PSV ratios at the site of the treated stenosis 1 days and 1 year after PTA (good result, residual stenosis, and recurrent stenosis). The DUS-determined anatomic result was correlated with the clinical outcome at 1 year. Clinical outcome was classified according to Society for Vascular Surgery/International Society for Cardiovascular Surgery (SVS/ISCVS) criteria.Results: Good results with DUS (PSV ratio 1 day and 1 year after PTA≥2.5) were found in 45 of 70 segments (64.3%), residual stenoses (PSV ratio≥2.5 1 day after PTA) in 15 of 70 segments (21.4%), and recurrent stenoses (PSV ratio 1 day after PTA