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Global platelet reactivity and high risk ACS patients
Date:8/28/2012

Global platelet reactivity is more effective than responsiveness to clopidogrel in identifying acute coronary syndrome (ACS) patients at high risk of ischemic events, according to research presented at ESC Congress 2012.

The results from the RECLOSE 2-ACS study were presented by Dr Rossella Marcucci from the University of Florence.

The Responsiveness to Clopidogrel and Stent thrombosis 2 ACS (RECLOSE 2-ACS) study is a prospective, observational, referral centre cohort study of 1,789 patients with acute coronary syndromes undergoing percutaneous coronary intervention (PCI) at the Division of Cardiology, Careggi Hospital, Florence, Italy.

Dual antiplatelet therapy with aspirin and clopidogrel is the cornerstone of therapy in these patients to improve prognosis and reduce adverse cardiovascular events, stent thrombosis and cardiovascular death.

"In recent years, we and other groups have focused our attention on the role of platelet inhibition," said Dr Marcucci.

"We found that a significant percentage of patients on clopidogrel therapy the so-called nonresponders to clopidogrel had a high platelet reactivity (HPR) on clopidogrel and a significantly higher risk of developing an adverse ischemic event at a follow-up of 2 years."

A number of genetic and acquired conditions are associated with a high platelet reactivity on clopidogrel. Carriers of a genetic variant (the CYP2C19*2 polymorphism), diabetics, older patients, females and patients with a reduced renal and cardiac function have a higher risk of maintaining a high platelet reactivity on clopidogrel. In addition, the concomitant use of drugs such as proton pump inhibitors (PPIs) is associated with a reduced metabolization of clopidogrel (which is a prodrug and needs to be metabolized to the active drug by the liver) and a high risk of high platelet reactivity.

The aim of the current study was to evaluate whether a high platelet reactivity due
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Contact: European Society of Cardiology
press@escardio.org
33-049-294-8627
European Society of Cardiology
Source:Eurekalert

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