Purpose: To evaluate the efficacy of intravascular stents used to treat long-segment stenoses and occlusions of the superficial femoral artery (SFA) after suboptimal angioplasty.
Methods: Fifty-eight limbs in 55 patients who underwent stenting of the SFA were identified from a vascular registry. Indications for stent placement after suboptimal PTA included flow-limiting dissection, residual pressure gradient (>15 mm Hg) or stenosis (>30%), or failure to establish initial patency. Lesion length ranged from 6 to 35 cm (mean, 16.5 cm). Endpoints for primary patency were: restenosis of >50%, reocclusion, or diminution of the postprocedure ankle-brachial index greater than 0.15.
Results: The mean ankle-brachial index improved from 0.48 +/- 0.19 to 0.71 +/- 0.23 (p = 0.001). Primary patency rates by Kaplan-Meier estimates at 1 month, 6 months, and 1 year were 88%, 47%, and 22%, respectively. Secondary patency rates were 94% at 1 month, 59% at 6 months, and 46% at 1 year. The median time to reaching an endpoint of restenosis or reocclusion was 6 months primarily and 9 months secondarily. Clinical improvement at the time of latest follow-up occurred in 56% of patients (mean, 13.8 months). Periprocedural complications occurred in 24.5% of patients with the first intervention. The only factor that favorably influenced outcome was improvement in clinical category after the procedure (p = 0.001).
Conclusions: There was a high incidence of restenosis and reocclusion with long-segment SFA disease that required stents to achieve initial success. Despite close surveillance and reintervention, anatomic patency at 1 year was poor. However, clinical benefit was maintained in the majority of patients. The outcome was similar in the claudication population compared with those who had limb-threatening ischemia. Percutaneous revascularization of long-segment SFA disease requiring stents should be reserved for patients with critical limb ischemia for which no reasonable surgical alternative exists.