 1. Clopidogrel loading: Clopidogrel loading pre PCI is recommended, but post PCI clopidogrel loading is acceptable per standard of care. In all patients whether or not clopidogrel is initiated pre or post PCI, prior to blood drawing for VerifyNow platelet function testing, a 600 mg loading dose must have been given at least 6 hours prior, or a 300 mg loading dose must have been given at least 12 hours prior, or the patient must have been maintained on at least 75 mg of clopidogrel daily for at least 5 days. 