Study of Optimal Clopidogrel Duration in Patients Receiving Drug Eluting Stents (SCORE Trial)

Completed · Not applicable

Conditions studied: Myocardial Infarction

In brief

Although the optimal duration of clopidogrel (an anti-platelet agent) therapy has been established after bare metal stent implantation in the blood vessels of the heart, there is lack of consensus regarding the optimal duration of therapy after implantation of a drug eluting stents (DES). Current American College of Cardiology guidelines recommend clopidogrel use for at least one year in the absence of contraindications after DES implantation, while recognizing that the optimal duration remains unknown. While an extended clopidogrel therapy (that is beyond the current 1 year recommendation) may increase bleeding complication, it may reduce the rates of adverse cardiovascular events like heart attacks and repeat revascularization procedures. A clinical trial which randomizes patients with an uneventful one year course after a DES implantation, to an additional year of clopidogrel and aspirin therapy versus aspirin alone, will be able to answer the important question about the role of extended (2y) dual anti-platelet therapy with clopidogrel and aspirin after DES implants. The investigators hypothesize that clopidogrel discontinuation at 1 year post-DES implantation is associated with an increase in cardiovascular events during the one year of follow-up period.

Key facts

Study ID

NCT00781573

Run by

North Texas Veterans Healthcare System

People needed

167

Starts

2008-09-11

Expected to finish

2014-03-03

Last updated by the study team

2018-09-13

Who can join

Age: 21 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Post-PCI patients receiving at least 1 DES
• Completed 9-15 months follow-up free of MI, repeat revascularization
• Able to provide informed consent
• Have continued dual anti-platelet therapy with aspirin and clopidogrel for 1 year post-PCI

You may not qualify if…

• Patients allergic to aspirin
• Patients with aspirin resistance
• Patients with allergy to clopidogrel
• Patients on concomitant warfarin therapy
• History of bleeding diathesis, coagulopathy, and/or platelet count < 100,000 cubic mm
• Patients with a life expectancy less than 1 year due to active cancers (except basal cell carcinoma)
• Pregnancy

Where it is running

• Dallas Veterans Hospital — Dallas, Texas, United States
• The Onassis cardiac Surgery Centre — Athens, Greece
• Escorts Health Institute & Research Centre Ltd — New Delhi, India

Full record on ClinicalTrials.gov

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