title: Effects of glycoprotein IIb/IIIa inhibitors in patients undergoing percutaneous coronary intervention after pretreatment with clopidogrel: a meta-analysis of randomized trials.
abstract: Glycoprotein (Gp) IIb/IIIa inhibitors reduce morbidity and mortality in patients undergoing percutaneous coronary intervention (PCI) when added to aspirin and heparin. However, the benefits of Gp IIb/IIIa inhibition in patients pretreated with clopidogrel are less clear. We conducted a meta-analysis to determine the efficacy and safety of adding a Gp IIb/IIIa inhibitor to clopidogrel, aspirin, and heparin before PCI. Five trials were identified via electronic searches of the MEDLINE and Cochrane Central Register of Controlled Trials databases. The studies randomized a total of 5303 patients; 2654 received a Gp IIb/IIIa inhibitor. Two trials examined patients with acute coronary syndromes and 3 examined patients undergoing elective PCI. Loading doses of clopidogrel ranged from 375 to 600 mg. Follow-up ranged from 30 days to 1 year.Gp IIb/IIIa inhibition did not reduce the endpoints of death, myocardial infarction (MI), or target vessel revascularization (odds ratio [OR] = 0.84; 95% confidence interval [CI] = 0.58-1.22, P = 0.35 for death; OR = 0.86; 95% CI = 0.69-1.08, P = 0.19 for MI; and OR = 0.96; 95% CI = 0.81-1.15, P = 0.68 for target vessel revascularization). Analyses restricted to acute coronary syndromes trials yielded similar results (OR = 0.70; 95% CI = 0.33-1.48, P = 0.35 for death; OR = 0.78; 95% CI = 0.59-1.03, P = 0.08 for MI). Gp IIb/IIIa inhibition increased major and minor bleeding (OR = 1.35; 95% CI = 1.04-1.75, P = 0.02) driven by use of abciximab. There was no evidence of heterogeneity in the analyses.
authors.affiliation: Department of Medicine, New Hanover Regional Medical Center, Wilmington, North Carolina, USA.
authors.forename: Rajmony
authors.initials: R
authors.lastname: Pannu
authors.forename: Richard
authors.initials: R
authors.lastname: Andraws
mesh_terms: D000077284:Abciximab; D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000379:methods*; D000911:Antibodies, Monoclonal / Q000008:administration & dosage* / Q000009:adverse effects; D000077144:Clopidogrel; D016001:Confidence Intervals; D017023:Coronary Angiography; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000401:mortality* / Q000628:therapy*; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D007140:Immunoglobulin Fab Fragments / Q000008:administration & dosage* / Q000009:adverse effects; D008297:Male; D016017:Odds Ratio; D019039:Platelet Glycoprotein GPIIb-IIIa Complex / Q000037:antagonists & inhibitors*; D011379:Prognosis; D016032:Randomized Controlled Trials as Topic; D018570:Risk Assessment; D012680:Sensitivity and Specificity; D016019:Survival Analysis; D013988:Ticlopidine / Q000008:administration & dosage / Q000009:adverse effects / Q000031:analogs & derivatives*; D016896:Treatment Outcome
chemical_list: D000911:Antibodies, Monoclonal; D007140:Immunoglobulin Fab Fragments; D019039:Platelet Glycoprotein GPIIb-IIIa Complex; D000077144:Clopidogrel; D013988:Ticlopidine; D000077284:Abciximab