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Sirolimus-Eluting Stents for Chronic Total Coronary Occlusions

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00258596
Recruitment Status : Completed
First Posted : November 24, 2005
Last Update Posted : March 6, 2007
Cordis Corporation
Information provided by:
R&D Cardiologie

Brief Summary:
Primary intracoronary stent placement after successfully crossing chronic total occlusions (CTO) decreases the high restenosis rate at long-term follow-up compared with conventional balloon angioplasty. Several studies have shown the efficacy of sirolimus-eluting stents in selected groups of patients. Whether sirolimus-eluting stents are superior to bare metal stents in CTO is unknown. In this prospective randomized trial, bare metal stent implantation will be compared with sirolimus-eluting stent implantation for the treatment of chronic total coronary occlusions. A total of 200 patients will be followed up for 6, 12, and 24 months with angiographic follow-up at 6 months. Quantitative coronary analysis will be performed by an independent core laboratory. The primary end point is the binary angiographic restenosis and reocclusion rate at 6 month follow-up.

Condition or disease Intervention/treatment Phase
Coronary Artery Disease Coronary Disease Coronary Stenosis Device: sirolimus-eluting stent Phase 3

Detailed Description:

Since data from the 2 landmark studies, the BENESTENT and STRESS studies, showed that coronary stenting significantly decreases restenosis as compared with conventional balloon angioplasty, this treatment modality has shown to be superior in an increasing number of indications. Percutaneous coronary intervention of chronic total occlusions (CTO), however, is still limited by high restenosis rates. Although coronary stenting using bare metal stents significantly decreases restenosis in CTO, restenosis rates still reach 32% to 55%.

In 200 patients with CTO randomized in the PRISON I study, we demonstrated a restenosis rate of 22% after bare metal stent implantation as compared with 33% after conventional balloon angioplasty. During the past few years, sirolimus (rapamycin), a cytostatic macrocyclic lactone with anti-inflammatory and antiproliferative properties, delivered from a polymer-encapsulated stent was shown to almost eliminate the risk of restenosis in selected groups of patients.

In this prospective, randomized, single-blind trial we enrolled 200 patients with chronic total occlusions: 100 were randomly assigned to receive bare metal BxVelocity™ stents, and 100 to receive sirolimus-eluting Cypher™ stents. The primary endpoint was angiographic binary restenosis rate at six months follow-up. Secondary endpoints were a composite of major adverse cardiac events, target vessel failure, in-stent and in-segment minimal lumen diameter, percentage diameter stenosis, and late luminal loss at six months follow-up. Clinical long-term follow-up will performed up till 24 months

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Study Type : Interventional  (Clinical Trial)
Enrollment : 200 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single
Primary Purpose: Treatment
Official Title: Sirolimus-Eluting Stents for Chronic Total Coronary Occlusions: A Randomized Comparison of Bare Metal Stent Implantation With Sirolimus-Eluting Stent Implantation for the Treatment of Chronic Total Coronary Occlusions (PRISON II)
Study Start Date : January 2003
Study Completion Date : September 2006

Resource links provided by the National Library of Medicine

Drug Information available for: Sirolimus

Primary Outcome Measures :
  1. The binary restenosis rate (defined as restenosis >50% on follow-up angiography) at six-month angiography

Secondary Outcome Measures :
  1. A composite of: Major adverse cardiac events (death, myocardial infarction, and ischemia driven target lesion revascularization)
  2. Target vessel failure (defined as a composite of death from cardiac causes, myocardial infarction, and ischemia-driven target-vessel revascularization) at 6 month
  3. In-stent and in-segment minimal lumen diameter
  4. Percentage in-stent and in-segment diameter stenosis
  5. In-stent and in-segment late luminal loss at six months follow-up

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Estimated duration of the chronic total coronary occlusion of at least two weeks
  • Evidence of ischemia related to the target vessel (signs of ischemia during an abnormal exercise test, defined as ST depression of at least 1.0 mm that is horizontal or down-sloping or up-sloping ST depression of at least 2.0 mm or signs of ischemia found during nuclear imaging with exercise, dobutamine or adenosine).

Exclusion Criteria:

  • The lesion could not be crossed
  • The use of heparin, aspirin and clopidogrel was prohibited
  • Severe renal failure (creatinine>250µmol/L)
  • Patients were unwilling or unable to complete follow-up.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00258596

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Onze Lieve Vrouwe Gasthuis
Amsterdam, Netherlands, 1090HM
St Antonius Hospital
Nieuwegein, Netherlands, 3435CM
Sponsors and Collaborators
R&D Cardiologie
Cordis Corporation
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Principal Investigator: Maarten J. Suttorp, MD, PhD St. Antonius Hospital


Publications automatically indexed to this study by Identifier (NCT Number):
Layout table for additonal information Identifier: NCT00258596    
Other Study ID Numbers: RDC-2002-01-PRISON II
First Posted: November 24, 2005    Key Record Dates
Last Update Posted: March 6, 2007
Last Verified: January 2007
Keywords provided by R&D Cardiologie:
drug-eluting stent
chronic total occlusion
sirolimus-eluting stent
zotarolimus-eluting stent
Additional relevant MeSH terms:
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Coronary Artery Disease
Coronary Disease
Coronary Stenosis
Coronary Occlusion
Myocardial Ischemia
Heart Diseases
Cardiovascular Diseases
Arterial Occlusive Diseases
Vascular Diseases
Anti-Bacterial Agents
Anti-Infective Agents
Antibiotics, Antineoplastic
Antineoplastic Agents
Antifungal Agents
Immunosuppressive Agents
Immunologic Factors
Physiological Effects of Drugs