Patients will receive either abciximab and reteplease or abciximab alone. Safety evaluations will be performed at specified intervals throughout the study and will consist of laboratory tests, vital signs (such as blood pressure), physical examinations and the occurrence and severity of adverse events as well as other study specific procedures. Patients will receive either abciximab and reteplease or abciximab and placebo into a vein in their arm for up to 12 hours.