ThrombElastoGraphic Coagulation Status and Antiplatelet Therapy After Coronary Artery Bypass Graft Surgery

2014-08-27 03:16:45 | BioPortfolio


The purpose of this study is to determine whether adding clopidogrel to aspirin after coronary bypass operation (CABG) improves graft patency, in patients that have preoperatively increased platelet activity(hypercoagulable) and therefore greater risk of graft occlusion( thrombosis).


Graft patency after CABG is reported to 80-90% worldwide 1 year following surgery. In the immediate period after surgery, and the following month, graft occlusion mainly occurs due to thrombosis.

Patients with platelet hyperreactivity have increased risk of thromboembolic events, including graft occlusion, myocardial infarction and stroke. Therefore intensifying the antiplatelet therapy in these patients, must be anticipated to have beneficial effects.

Hypercoagulable patients are identified with thrombelastography(TEG) as having a Maximal Amplitude(MA)>69, thereafter randomized to either clopidogrel(3months) and aspirin or aspirin alone. A control group of normocoagulable patients is also studied. At 3 months postoperative and then again 1 year after surgery the coronary graft patency is assessed with Multislice CT scan.

Pre- and postoperatively, and then again at 3month and 1-year followup, TEG and multiplate aggregometry are performed to assess platelet reactivity and resistance to aspirin and clopidogrel.

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment


Saphenous Vein Graft Disease


Clopidogrel+acetylsalicylic acid, acetylsalicylic acid, acetylsalicylic acid


Dep. of cardiothoracic surgery, Rigshospitalet




Rigshospitalet, Denmark

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:16:45-0400

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A nucleoside diphosphate sugar which serves as a source of glucuronic acid for polysaccharide biosynthesis. It may also be epimerized to UDP iduronic acid, which donates iduronic acid to polysaccharides. In animals, UDP glucuronic acid is used for formation of many glucosiduronides with various aglycones.

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