Author + information
- Byoung Kwon Lee,
- Hyuck Moon Kwon,
- Young Won Yoon,
- Pil-Ki Min,
- Bum-Kee Hong,
- Myeong-Ki Hong,
- Yang Soo Jang and
- Byeong-Keuk Kim
Optical coherance tomography (OCT) studies have demonstrated delayed neointimal coverage following drug-eluting stent (DES) implantation. While newer DESs promote more favorable vascular healing, the clinical implications are still under-investigating. The advantages that Zotarolimus-eluting stent (ZES) is coated with highly biocompatible polymer and biolimus-eluting stent (BES) has biodegradable polymer might provide clinical studies showing that both stents are quite safe as well as efficacious. This study is objected to investigate 6month neointimal coverage of these 2nd generation DES.
Significant coronary artery stenosis amenable for coronary revascularization with single stent (diameter of 2.75-4.0 mm and length of ≤ 30mm) were enrolled. Patients with acute ST elevation MI were excluded. 60 consecutive patients were randomly assigned to BES (n=30) versus ZES (n=30). Angiographic follow-up and time-domain OCT imaging with motorized pull-back at 1 mm/s was performed at six months after study stent implantation in all patients. OCT endpoints are endothelial coverage failure, expressed as % of struts without coverage, and neoinitimal hyperplasia (NIH).
Baseline clinical characteristics were different in both groups. During follow up, there were no clinical events including myocardial infarction, stroke, or target vessel failure. Angiographic follow up data were not significantly different. Stent diameter (mm) in BES and ZES were 3.44±0.47, 3.31±0.42, respectively (p=0.283). Stent length (mm) in BES and ZES were 17.4±4.2, 17.8±4.3 (p=0.673). Late loss (mm) was 0.13±0.25, 0.18±0.28 (p=0.541). OCT follow up data also were not significantly different. Uncovered strut (%) in BES and ZES were 20.5±21.8, 17.7±22.4, respectively (p=0.625). Mean NIH (mm2) in BES and ZES were 0.38±0.28, 0.45±0.32 (p=0.409). Intra-stent thrombi were not noticed in both groups.
The cumulative OCT and angiographic results in both ZES and BES were not significantly different. BES with biodegradable polymer has comparable angiographic and OCT outcome with ZES with durable polymer. Further data would be needed for this conclusion.
Poster Sessions, Expo North
Sunday, March 10, 2013, 3:45 p.m.-4:30 p.m.
Session Title: New Tests, Targets and Treatments in SIHD
Abstract Category: 10. Chronic CAD/Stable Ischemic Heart Disease: Clinical
Presentation Number: 1240-65
- 2013 American College of Cardiology Foundation