Faculty Collaboration Database

Bivalirudin and clopidogrel with and without eptifibatide for elective stenting: effects on platelet function, thrombelastographic indexes, and their relation to periprocedural infarction results of the CLEAR PLATELETS-2 (Clopidogrel with Eptifibatide to Arrest the Reactivity of Platelets) study. J Am Coll Cardiol 2009 Feb 24;53(8):648-57

Date

02/24/2009

Pubmed ID

19232896

DOI

10.1016/j.jacc.2008.10.045

Scopus ID

2-s2.0-60049091974 (requires institutional sign-in at Scopus site)   67 Citations

Abstract

OBJECTIVES: The primary objective of this study was to compare the effect of therapy with bivalirudin alone versus bivalirudin plus eptifibatide on platelet reactivity measured by turbidometric aggregometry and thrombin-induced platelet-fibrin clot strength (TIP-FCS) measured by thrombelastography in percutaneous coronary intervention (PCI) patients. The secondary aim was to study the relation of platelet aggregation and TIP-FCS to the occurrence of periprocedural infarction.

BACKGROUND: Bivalirudin is commonly administered alone to clopidogrel naïve (CN) patients and to patients on maintenance clopidogrel therapy (MT) undergoing elective stenting. The effect of adding eptifibatide to bivalirudin on platelet reactivity (PR) and TIP-FCS, and their relation to periprocedural infarction in these patients are unknown.

METHODS: Patients (n = 200) stratified to clopidogrel treatment status were randomly treated with bivalirudin (n = 102) or bivalirudin plus eptifibatide (n = 98). One hundred twenty-eight CN patients were loaded with 600 mg clopidogrel immediately after stenting, and 72 MT patients were not loaded. The PR, TIP-FCS, and myonecrosis markers were serially determined.

RESULTS: In CN and MT patients, bivalirudin plus eptifibatide was associated with markedly lower PR at all times (5- and 20-microM adenosine diphosphate-induced, and 15- and 25-microM thrombin receptor activator peptide-induced aggregation; p < 0.001 for all) and reduced mean TIP-FCS (p < 0.05). Patients who had a periprocedural infarction had higher mean 18-h PR (p < 0.0001) and TIP-FCS (p = 0.002).

CONCLUSIONS: For elective stenting, the addition of eptifibatide to bivalirudin lowered PR to multiple agonists and the tensile strength of the TIP-FCS, 2 measurements strongly associated with periprocedural myonecrosis. Future studies of PR and TIP-FCS for elective stenting may facilitate personalized antiplatelet therapy and enhance the selection of patients for glycoprotein IIb/IIIa blockade. (Peri-Procedural Myocardial Infarction, Platelet Reactivity, Thrombin Generation, and Clot Strength: Differential Effects of Eptifibatide + Bivalirudin Versus Bivalirudin [CLEAR PLATELETS-2]; NCT00370045.

Author List

Gurbel PA, Bliden KP, Saucedo JF, Suarez TA, DiChiara J, Antonino MJ, Mahla E, Singla A, Herzog WR, Bassi AK, Hennebry TA, Gesheff TB, Tantry US

Author

Jorge Saucedo MD Chief, Professor in the Medicine department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Adenosine Diphosphate
Aged
Angioplasty, Balloon, Coronary
Anticoagulants
Blood Coagulation
Blood Platelets
Collagen
Drug Therapy, Combination
Female
Hemorheology
Hirudins
Humans
Male
Middle Aged
Myocardial Infarction
Peptide Fragments
Peptides
Platelet Aggregation
Platelet Aggregation Inhibitors
Receptors, Thrombin
Recombinant Proteins
Stents
Thrombelastography
Ticlopidine