Optimizing Aspirin and Clopidogrel Therapy (BOchum CLopidogrel and Aspirin Plan) (BOCLAplan)

August 11, 2011 updated by: Ruhr University of Bochum

Optimizing Therapy With Aspirin and Clopidogrel. The BOchum CLopidogrel and Aspirin Plan to Improve Dual Antiplatelet Therapy.

Dual antiplatelet therapy with acetylsalicylic acid (ASA, aspirin) and clopidogrel is of great importance for treatment following coronary stenting. Unfortunately the variable platelet inhibitory effectiveness compromises the antithrombotic benefit of dual antiplatelet therapy. The aim of this prospective single centre study was to reduce the low response incidence of dual antiplatelet therapy with ASA and clopidogrel based on a standardized therapy algorithm.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Platelet function testing using whole blood aggregometry was performed 48 hours following coronary stenting (either acute coronary syndromes or stable coronary artery disease). The antiplatelet therapy included a loading dose of 600 mg clopidogrel and 500 mg ASA, followed by 75 mg clopidogrel and 100 mg ASA once daily. Clopidogrel low-response (CLR) and/or ASA (ASA low response) were treated according to a structured therapy plan.

Study Type

Interventional

Enrollment (Actual)

500

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Germany
    • NRW
      • Bochum, NRW, Germany, D-44791
        • Cardiovascular Center, Ruhr University Bochum, St. Josef - Hospital, Gudrunstrasse 56

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients with stable coronary artery disease (CAD) or acute coronary syndromes (ACS) following percutaneous coronary intervention (PCI)

Exclusion Criteria:

  • abnormal platelet count in patients,
  • severe liver disorders,
  • current gastrointestinal disorders,
  • current infections,
  • congestive heart failure,
  • known bleeding disorders,
  • treatment with bivalirudin or glycoprotein IIb/IIIa antagonists within the last 7 days.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: aspirin, clopidogrel
If the treatment with aspirin and/or clopidogrel is insufficient (platelet function testing) the dose was increased or the drug was changed (clopidogrel to ticlopidine or prasugrel)
Drug: Optimizing ASA and clopidogrel treatment

ASA 100 mg, ASA 300 mg, ASA 500 mg

Clopidogrel 75 mg, Clopidogrel 150 mg, Ticlopidine 2x 250 mg, Prasugrel 10 mg. Intervention List:

In the case of clopidogrel low-response, the maintenance dose was doubled (repeated loading dose followed by 150 mg daily), and when still ineffective ticlopidine or prasugrel, if available and not contraindicated, were used. ASA low-responders were treated by increasing the dose to 300 mg in a first step or to 500 mg ASA when the first modification was not sufficient.

Other Names:
  • ASA (aspirin), Clopidogrel (Plavix)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Number of Participants Who Were Responders or Low-Responders of Antiplatelet Therapy as a Result of Whole Blood Aggregometry Testing (See Outcome Measure Description)
Time Frame: 2 years

In patients treated with aspirin and clopidogrel aggregometry was performed and depending on the results the patients were either responder or low-responder of antiplatelet therapy.

The following definitions were used for clopidogrel low response (CLR: >5 ohm when stimulated with adenosine diphosphate (ADP) 5 μM) and ASA low response (ALR: >0 ohm;stimulated with arachidonic acid 10 μM) with the ChronoLog 590 aggregometer. In the case of low-response alternative antiplatelet therapy was modified according to the study plan (see protocol section).
2 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Ruhr University of Bochum

Investigators

  • Principal Investigator: Horst Neubauer, MD, Ruhr-University Bochum, Cardiovascular Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

October 1, 2008

Primary Completion (Actual)

March 1, 2010

Study Completion (Actual)

April 1, 2010

Study Registration Dates

First Submitted

September 29, 2010

First Submitted That Met QC Criteria

September 29, 2010

First Posted (Estimate)

September 30, 2010

Study Record Updates

Last Update Posted (Estimate)

September 16, 2011

Last Update Submitted That Met QC Criteria

August 11, 2011

Last Verified

September 1, 2010

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • BOCLAplan01
  • F654R (Registry Identifier: F654R Ruhr-University Bochum)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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