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| ID | Type | Description | Link |
|---|---|---|---|
| F654R | Registry Identifier | F654R Ruhr-University Bochum |
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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.
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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| aspirin, clopidogrel | Experimental | 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) |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Optimizing ASA and clopidogrel treatment | Drug | 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. |
| 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) | 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 |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Horst Neubauer, MD | Ruhr-University Bochum, Cardiovascular Center | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Cardiovascular Center, Ruhr University Bochum, St. Josef - Hospital, Gudrunstrasse 56 | Bochum | North Rhine-Westphalia | D-44791 | Germany |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 20570595 | Background | Geisler T, Gawaz M, Steinhubl SR, Bhatt DL, Storey RF, Flather M. Current strategies in antiplatelet therapy--does identification of risk and adjustment of therapy contribute to more effective, personalized medicine in cardiovascular disease? Pharmacol Ther. 2010 Aug;127(2):95-107. doi: 10.1016/j.pharmthera.2010.04.017. Epub 2010 Jun 1. | |
| 18765393 |
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post coronary stenting
Medical Clinic, 504 patients 2007-2010
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| ID | Title | Description |
|---|---|---|
| FG000 | 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) |
| Title | Milestones | Reasons Not Completed | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Study |
|
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| ID | Title | Description |
|---|---|---|
| BG000 | 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) |
| Units | Counts |
|---|---|
| Participants |
|
| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes |
|---|---|---|---|---|---|---|---|---|---|
| Age, Categorical | Count of Participants |
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | Number of Participants Who Were Responders or Low-Responders of Antiplatelet Therapy as a Result of Whole Blood Aggregometry Testing (See Outcome Measure Description) | 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). | Sample size calculation: With the assumption that the incidence of clopidogrel low response was at least 20% and ASA low response 10%. Choosing a power of 97.5% and a two-sided value of 0.05, an overall sample size was required of at least 400 patients. To compensate for a possible loss of follow-up, we aimed for inclusion of approx. 500 patients. | Posted | Number | 95% Confidence Interval | participants | 2 years |
|
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | 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) |
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| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Dr Horst Neubauer | Cardiology Dep, Ruhr-University Bochum | +49-234-509-2326 | Horst.Neubauer@rub.de |
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| ID | Term |
|---|---|
| D003324 | Coronary Artery Disease |
| ID | Term |
|---|---|
| D003327 | Coronary Disease |
| D017202 | Myocardial Ischemia |
| D006331 | Heart Diseases |
| D002318 | Cardiovascular Diseases |
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| ID | Term |
|---|---|
| D001241 | Aspirin |
| D000077144 | Clopidogrel |
| ID | Term |
|---|---|
| D012459 | Salicylates |
| D062385 | Hydroxybenzoates |
| D010636 | Phenols |
| D001555 | Benzene Derivatives |
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|
|
| Collet JP, Silvain J, Landivier A, Tanguy ML, Cayla G, Bellemain A, Vignolles N, Gallier S, Beygui F, Pena A, Montalescot G. Dose effect of clopidogrel reloading in patients already on 75-mg maintenance dose: the Reload with Clopidogrel Before Coronary Angioplasty in Subjects Treated Long Term with Dual Antiplatelet Therapy (RELOAD) study. Circulation. 2008 Sep 16;118(12):1225-33. doi: 10.1161/CIRCULATIONAHA.108.776757. Epub 2008 Sep 2. |
| 20708365 | Background | Bonello L, Armero S, Ait Mokhtar O, Mancini J, Aldebert P, Saut N, Bonello N, Barragan P, Arques S, Giacomoni MP, Bonello-Burignat C, Bartholomei MN, Dignat-George F, Camoin-Jau L, Paganelli F. Clopidogrel loading dose adjustment according to platelet reactivity monitoring in patients carrying the 2C19*2 loss of function polymorphism. J Am Coll Cardiol. 2010 Nov 9;56(20):1630-6. doi: 10.1016/j.jacc.2010.07.004. Epub 2010 Aug 12. |
| 18278186 | Background | Neubauer H, Lask S, Engelhardt A, Mugge A. How to optimise clopidogrel therapy? Reducing the low-response incidence by aggregometry-guided therapy modification. Thromb Haemost. 2008 Feb;99(2):357-62. doi: 10.1160/TH07-10-0624. |
| 17261652 | Background | Angiolillo DJ, Shoemaker SB, Desai B, Yuan H, Charlton RK, Bernardo E, Zenni MM, Guzman LA, Bass TA, Costa MA. Randomized comparison of a high clopidogrel maintenance dose in patients with diabetes mellitus and coronary artery disease: results of the Optimizing Antiplatelet Therapy in Diabetes Mellitus (OPTIMUS) study. Circulation. 2007 Feb 13;115(6):708-16. doi: 10.1161/CIRCULATIONAHA.106.667741. Epub 2007 Jan 29. |
| 21226927 | Derived | Neubauer H, Kaiser AF, Endres HG, Kruger JC, Engelhardt A, Lask S, Pepinghege F, Kusber A, Mugge A. Tailored antiplatelet therapy can overcome clopidogrel and aspirin resistance--the BOchum CLopidogrel and Aspirin Plan (BOCLA-Plan) to improve antiplatelet therapy. BMC Med. 2011 Jan 12;9:3. doi: 10.1186/1741-7015-9-3. |
| Participants |
|
| Age Continuous | Mean | Standard Deviation | years |
|
| Sex: Female, Male | Count of Participants | Participants |
|
| Region of Enrollment | Number | participants |
|
| Description |
|---|
| OG000 | Clopidogrel Low Response | 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) |
|
|
| 0 |
| 504 |
| 0 |
| 504 |
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| D001161 |
| Arteriosclerosis |
| D001157 | Arterial Occlusive Diseases |
| D014652 | Vascular Diseases |
| D006841 |
| Hydrocarbons, Aromatic |
| D006844 | Hydrocarbons, Cyclic |
| D006838 | Hydrocarbons |
| D009930 | Organic Chemicals |
| D013988 | Ticlopidine |
| D058924 | Thienopyridines |
| D013876 | Thiophenes |
| D013457 | Sulfur Compounds |
| D011725 | Pyridines |
| D006573 | Heterocyclic Compounds, 1-Ring |
| D006571 | Heterocyclic Compounds |
| D006574 | Heterocyclic Compounds, 2-Ring |
| D000072471 | Heterocyclic Compounds, Fused-Ring |