Nonpolymer- and Polymer-Based Drug-Eluting Stents for Restenosis (ISAR-TEST-1)

German Heart Center Munich

Status and phase

Completed

Phase 4

Conditions

Coronary Disease

Treatments

Device: Paclitaxel-eluting stent (Taxus)

Device: Rapamycin-eluting stent

Study type

Interventional

Funder types

Other

Identifiers

NCT00140530

GE IDE No. S02103

AZ 504/02

Details and patient eligibility

About

The purpose of this study is to assess the efficacy of nonpolymer-based rapamycin-eluting stent compared to standard polymer-based paclitaxel-eluting stent to reduce reblockage of coronary arteries.

Full description

Drug-eluting stents represent a major advance in the treatment of restenosis. They have dramatically reduced the need of repeat revascularization procedures, and, thanks to the excellent results obtained in various patient subsets, these devices are now used in almost 90% of the stent implantation procedures performed in US hospitals. Along with the increasing number of patients receiving drug-eluting stents and availability of long-term follow-up data, concern has arisen regarding the safety of these devices. At the core of this concern is the potential for increased inflammatory and thrombogenic responses and their life-threatening consequences associated with the polymers employed for the delivery of antirestenotic agents. A growing interest has been shown on polymer-free stents with a microporous surface as an alternative to stents employing polymeric coating for local drug delivery. Recently, we developed a mobile system which enables coating in the catheterization laboratory of polymeric free stents with different drug doses or combinations. Using a porcine coronary model of restenosis, we found that coating with rapamycin of a polymer-free microporous stent is feasible and effectively reduces neointimal proliferation. More recently, in a clinical study in which the efficacy of several doses of rapamycin was assessed, we showed that non-polymer coating with rapamycin is safe and leads to a dose-dependent reduction in restenosis. While the advantage deriving from the lack of polymeric cover in on-site coated rapamycin-eluting stents is readily understandable, their relative efficacy as compared with commercially available polymer-based drug-eluting stents has yet to be evaluated.

Comparison:

Polymer-free microporous stents coated with rapamycin versus standard polymer-based, paclitaxel-eluting stents

Enrollment

450 patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Patients at least 18 years old
Stable or unstable angina or a positive stress test
"de novo" coronary artery lesions
Written informed consent

Exclusion criteria

Myocardial infarction within 48 h. before enrollment
Target lesion located in left main trunk
Contraindication or known allergy to aspirin, heparin, thienopyridines, rapamycin, paclitaxel or stainless steel