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Glycoprotein IIb/IIIa receptor antagonists in the management of cardiovascular diseases.

Recent studies of the effects of glycoprotein (GP) IIb/IIIa receptor antagonists on the clinical outcomes of patients with cardiovascular diseases are reviewed. The GP IIb/IIIa receptor antagonists studied include abciximab (a murine monoclonal antibody); eptifibatide (a synthetic peptide); and tirofiban, lamifiban, xemilofiban, sibrafiban, and lefradafiban (synthetic nonpeptides). A majority of clinical trials of GP IIb/IIIa receptor antagonists have been performed in patients with unstable angina or acute myocardial infarction and in patients undergoing percutaneous coronary interventions in whom an intracoronary thrombus may lead to ischemic complications. There is abundant evidence that GP IIb/IIIa receptor antagonists reduce the risk of death, acute myocardial infarction, and urgent revascularization procedures in high- and low-risk patients undergoing percutaneous coronary interventions. Abciximab remains the most studied of these agents in interventional settings. Data are accumulating on synthetic peptide and nonpeptide GP IIb/IIIa receptor antagonists that also demonstrate lower rates of death and ischemic complications in the treatment of acute coronary syndromes. In patients who have had a successful response to intravenous GP IIb/IIIa receptor antagonists, oral agents may represent an option for secondary prevention. Additional studies are required in order to determine further uses for these agents. A growing body of evidence supports the role of GP IIb/IIIa receptor antagonists in invasive and pharmacologic treatment approaches to acute coronary syndromes.