Randomized trial investigates stent compression causing restenosis in vascular conduits, suggesting new considerations for stent deployment.
Key Points
This research aims to understand how restenosis occurs in superficial femoral arteries and hemodialysis conduits treated with balloon-expandable stents.
Evaluated a series of patients (N=11) with stents in compressible vascular sites (SFA and dialysis fistulae)
Conducted clinical, angiographic, and IVUS evaluations to identify mechanisms of restenosis
Examined detected stent deformation during IVUS examination after balloon expansion.
Stent compression identified as the primary cause of restenosis in all evaluated sites.
IVUS revealed two forms of compression: eccentric deformation implying two-point compressive force, and complete circumferential encroachment suggesting multidirectional forces.
Secondary restenosis due to recurrent compression occurred despite redilation in most sites.