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- Document type:
- Comparative Study; Journal Article; Multicenter Study; Research Support, Non-U.S. Gov't
- Author(s):
- Byrne, RA; Iijima, R; Mehilli, J; Pinieck, S; Bruskina, O; Schömig, A; Kastrati, A
- Title:
- Durability of antirestenotic efficacy in drug-eluting stents with and without permanent polymer.
- Abstract:
- OBJECTIVES: We sought to assess changes in antirestenotic efficacy of drug-eluting stents (DES) by restudying subjects at 2 time points after coronary stenting (6 to 8 months and 2 years) and to compare differences in time courses of late luminal loss (LLL) between 3 different DES platforms in use at our institution. BACKGROUND: DES therapy is associated with low levels of LLL at 6 to 8 months. The temporal course of neointimal formation after this time point remains unclear. METHODS: This prospective, observational, systematic angiographic follow-up study was conducted at 2 centers in Munich, Germany. Patients underwent stenting with permanent-polymer rapamycin-eluting stents (RES), polymer-free RES, or permanent-polymer paclitaxel-eluting stents (PES). The primary end point was delayed LLL (the difference in in-stent LLL between 6 to 8 months and 2 years). RESULTS: Of 2,588 patients undergoing stenting, 2,030 patients (78.4%) had 6- to 8-month angiographic follow-up and were enrolled in the study. Target lesion revascularization was performed in 259 patients; these patients were not considered for further angiographic analysis. Of 1,771 remaining patients, 1,331 had available 2-year reangiographic data (75.2%). Overall mean (SD) delayed LLL was 0.12 +/- 0.49 mm (0.17 +/- 0.50 mm, 0.01 +/- 0.42 mm, and 0.13 +/- 0.50 mm in permanent-polymer RES, polymer-free RES, and permanent-polymer PES groups, respectively [p < 0.001]). In multivariate analysis, only stent type (in favor of polymer-free RES) predicted delayed LLL. CONCLUSIONS: Ongoing erosion of luminal caliber beyond 6 to 8 months after the index procedure is observed following DES implantation. Absence of permanent polymer from the DES platform seems to militate against this effect.
- Journal title abbreviation:
- JACC Cardiovasc Interv
- Year:
- 2009
- Journal volume:
- 2
- Journal issue:
- 4
- Pages contribution:
- 291-9
- Language:
- eng
- Fulltext / DOI:
- doi:10.1016/j.jcin.2008.11.015
- Pubmed ID:
- http://view.ncbi.nlm.nih.gov/pubmed/19463439
- Print-ISSN:
- 1936-8798
- TUM Institution:
- I. Medizinische Klinik und Poliklinik (Kardiologie)
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