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Drug-eluting-stents for Unprotected Left Main Stem Disease (ISAR-LEFT-MAIN)

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: NCT00133237
Recruitment Status : Completed
First Posted : August 23, 2005
Last Update Posted : March 15, 2010
Technische Universität München
Information provided by:
Deutsches Herzzentrum Muenchen

Brief Summary:
The purpose of this study is to evaluate the efficacy of sirolimus- and paclitaxel-eluting stents for treatment of unprotected left main coronary artery disease.

Condition or disease Intervention/treatment Phase
Coronary Disease Device: Sirolimus-eluting stent Device: Paclitaxel-eluting stent Phase 4

Detailed Description:

With the advent of coronary stents and improvements in periprocedural antithrombotic regimen, the spectrum of indications of percutaneous coronary interventions has continuously expanded for patients with coronary heart disease, gaining ground in what have been traditionally considered as domains of coronary bypass surgery. Several groups reported the outcomes of patients with unprotected left main coronary artery (LMCA) disease treated with stenting. Most of them found that LMCA stenting was feasible and safe, and, in low-risk patients, it was associated with minimal periprocedural complications and low long-term morbidity and mortality. Despite these encouraging reports, a widespread use of this technique has been hampered by the still high incidence of restenosis. It is commonly accepted that coronary bypass graft surgery and stenting for unprotected LMCA disease are associated with similar rates of mortality, and that the higher incidence of restenosis and greater need for revascularization procedures after LMCA stenting remain the major contributors for the observed difference in clinical efficacy between both therapies. The recent introduction of stents eluting anti-restenotic drugs, with sirolimus and paclitaxel the most studied compounds, has opened new perspectives for the prevention of restenosis. Several randomized trials have reported excellent results in the reduction of restenosis and need for reinterventions with drug-eluting stents (DES). Although, none of these trials studied the benefit of DES for lesions located in the LMCA, their results suggested that use of these new devices may be particularly helpful for the reduction of restenosis in the group of patients with left main trunk disease. This is supported by the findings of several series of patients with unprotected LMCA disease who have been successfully treated with DES. Importantly, for patients who are unable to undergo CABG due to cardiac surgeons' refusal (poor surgical candidates) or their own unwillingness, stenting with DES remains the only revascularization alternative. Recent guidelines of PCI recommend stenting, preferentially with DES, for unprotected LMCA in the absence of other revascularization options.


Sirolimus-eluting stents compared with paclitaxel-eluting stent for treatment of lesions allocated at left main trunk.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 607 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Prospective, Randomized Trial of the Sirolimus-Eluting Stent and Paclitaxel-Eluting Stent for the Treatment of Unprotected Left Main Coronary Artery Disease(ISAR-LEFT-MAIN)
Study Start Date : July 2005
Actual Primary Completion Date : June 2008
Actual Study Completion Date : June 2008

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Active Comparator: A
Sirolimus-eluting stent (Cypher)
Device: Sirolimus-eluting stent
cypher stent is implanted due to randomization.
Other Name: Cypher

Active Comparator: B
Paclitaxel-eluting stent (Taxus)
Device: Paclitaxel-eluting stent
taxus stent is implanted due to randomization.
Other Name: Taxus

Primary Outcome Measures :
  1. Major adverse cardiac events (composite of death, myocardial infarction and target lesion revascularization) at one year [ Time Frame: one year ]

Secondary Outcome Measures :
  1. Angiographic restenosis at 6-9 month follow-up angiography (based on left main area analysis) [ Time Frame: 6-9 months ]

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:

  • Patients older than age 18 with ischemic symptoms or evidence of myocardial ischemia in the presence of ≥50% stenosis located in unprotected LMCA who are unable to undergo coronary artery bypass graft (CABG)
  • Pretreatment with a loading dose of 300-600 mg clopidogrel
  • Informed, written consent

Exclusion Criteria:

  • Cardiogenic shock;
  • ST-segment elevation acute myocardial infarction within 48 h from symptom onset;
  • In-stent restenosis;
  • Malignancies or other comorbid conditions with life expectancy less than one year;
  • Prior coronary artery bypass surgery with revascularization of left anterior descending (LAD) and/or left circumflex (LCx) coronary artery
  • Planned staged percutaneous coronary intervention (PCI) procedure within 30 days from index procedure or prior PCI within the last 30 days
  • Left main size >4.5mm
  • An elective surgical procedure is planned during the first six months post enrolment;
  • Known allergy to the study medications
  • Pregnancy
  • Patient's inability to fully cooperate with the study protocol

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): NCT00133237

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Deutsches Herzzentrum
Munich, Germany, 80636
First Medizinische Klinik, Klinikum rechts der Isar
Munich, Germany, 81675
Sponsors and Collaborators
Deutsches Herzzentrum Muenchen
Technische Universität München
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Study Chair: Albert Schömig, MD Deutsches Herzzentrum Muenchen
Principal Investigator: Adnan Kastrati, MD Deutsches Herzzentrum Muenchen
Publications of Results:
Other Publications:

Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Albert Schömig, Deutsches Herzzentrum Muenchen Identifier: NCT00133237    
Other Study ID Numbers: GE IDE No. S02005
First Posted: August 23, 2005    Key Record Dates
Last Update Posted: March 15, 2010
Last Verified: October 2008
Additional relevant MeSH terms:
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Coronary Disease
Myocardial Ischemia
Heart Diseases
Cardiovascular Diseases
Vascular Diseases
Antineoplastic Agents, Phytogenic
Antineoplastic Agents
Tubulin Modulators
Antimitotic Agents
Mitosis Modulators
Molecular Mechanisms of Pharmacological Action
Anti-Bacterial Agents
Anti-Infective Agents
Antibiotics, Antineoplastic
Antifungal Agents
Immunosuppressive Agents
Immunologic Factors
Physiological Effects of Drugs