Abstract 17803: The Impacts of Stent Recoil at Stent Fracture Sites on Late Restenosis After Drug-eluting Stent Implantation
Background: Stent fracture (SF) is related to midterm restenosis after drug-eluting stent (DES) implantation. SF with stent recoil (SR) is sometimes found after stent implantation. However, the impacts of SR at SF sites on clinical outcomes remain unclear. Thus, we compared the results of SF with SR and SF without SR after DES implantation at midterm and late follow-up (f/u).
Methods: From November 2002 to September 2010, 8253 patients with 10784 lesions underwent DES implantation successfully. Of these, 8817 lesions were angiographically followed after 6 to 8 months (midterm f/u) and 7027 were followed at 12 months after midterm f/u (late f/u). SF occurred in 5.3% (465/8817), of which SR occurred in 28.2% (131/465). Early restenosis was defined as restenosis at midterm f/u and late restenosis as restenosis at late f/u without early restenosis. We defined SF as apparent strut separation and SR as axial recoil less than 80% of the stent diameter, both of which were found by coronary angiography.
Results: Data are shown in the table.
Conclusions: SF and SR were risk factors of restenosis and target lesion revascularization at midterm and late f/u after DES implantation. These results suggest that mechanical stress is one cause of restenosis at both midterm and late f/u.
- © 2012 by American Heart Association, Inc.