Short TEG: cessation of clopidogrel following insertion of drug-eluting coronary stents

INTERVENTION: Patients are not randomised to any treatment in this trial. All enrolled patients are due to stop dual antiplatelet medication as part of their routine care. This study is assessing the effects of stopping clopidogrel at the end of a routine 12 months course of treatment. Patients are followed up in the study for approximately 7 weeks attending the hospital for 7 blood tests over that time. CONDITION: Topic: Cardiovascular; Subtopic: Cardiovascular (all Subtopics); Disease: Cardiovascular ; Circulatory System ; Percutaneous coronary intervention PRIMARY OUTCOME: Clopidogrel is routinely used for 12 months after drugeluting stent implantation SECONDARY OUTCOME: Any differences in inflammatory markers, measured at 12 months INCLUSION CRITERIA: 1. Aged greater than 18 years, either sex 2. Signed written informed consent 3. Prior percutaneous coronary intervention (PCI) with drugeluting stent implantation and due to stop clopidogrel 12 months after PCI 4. On maintenance dose aspirin 75 mg and clopidogrel 75 mg daily 5. 30 diabetics and 30 nondiabetics