Author + information
- Hideki Kitahara,
- Katsuhisa Waseda,
- Ryotaro Yamada,
- Kaori Nakagawa,
- Fumiaki Ikeno,
- Peter J. Fitzgerald and
- Yasuhiro Honda
Stent materials and post–dilatation strategies have shown an impact on acute stent expansion. This study aimed to evaluate whether those factors also affect chronic stent area preservation.
OCT was performed on 5 types of bare–metal core platform of drug–eluting stent: Driver, VISION, Select, Liberté, and S–Stent (ϕ3.0 mm, N=6 each) in a silicon–tube bench model during and after balloon inflation at post–dilatation, and at 4 and 10 months follow–up (MFU). As post–dilatation strategies, a single long (30 s) vs. multiple short (10 s × 3 times) inflations were performed using a non–compliant balloon (ϕ3.25 mm).
Stent areas at post–dilatation were larger in stainless steel (SS) stents due to less acute recoil than in cobalt chromium (CC) stents, and were larger after multiple short inflations than after a single long inflation. During 4MFU, all stent types showed further stent recoil to similar degrees (Driver −4.4%, VISION −4.8%, Select −5.0%, Liberté −4.5%, S–Stent −3.8%, p=NS), but no additional recoil from 4 to 10MFU. These chronic results were similar regardless of stent materials and post–dilatation strategies. Consequently, stent areas at 10MFU were larger in SS stents than CC stents, and were larger in multiple short inflations than in a single long inflation.
OCT revealed modest chronic recoil at 4MFU in all stent types with no further stent area loss at 10MFU. The affects of stent materials and post–dilatation strategies seen acutely were preserved at 10MFU.
Poster Sessions, Expo North
Saturday, March 09, 2013, 10:00 a.m.–10:45 a.m.
Session Title: Coronary Stents
Abstract Category: 47. TCT@ACC–i2: Coronary Intervention, Devices
Presentation Number: 2101–235
- 2013 American College of Cardiology Foundation