Acute ischaemic coronary syndromes, the clinical sequelae of thrombosis over a fissured atherosclerotic plaque within the coronary circulation, are the leading cause of death and hospitalisation in Western countries. Platelets are fundamental for the initiation and continuation of thrombosis, and currently available anti-platelet agents such as aspirin significantly improve the clinical outcome of patients with these syndromes. Therapeutic success with available therapy is however not universal, and adverse clinical event rates remain high. Several new classes of agents with a variety of anti-platelet actions are currently under development. Those which inhibit the final common pathway of platelet aggregation, the glycoprotein (GP) IIb/IIIa receptor, appear to show the most promise. Much clinical trial evidence already exists supporting the use of GP IIb/IIIa receptor antagonists in the management of acute ischaemic coronary syndromes. Several clinical studies are underway to further refine this knowledge base, and to assess their efficacy in a variety of novel applications.
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