Relationship Between Dosage of Clopidogrel and Platelet Aggregation in Chinese With Different Genotype

This study is a prospective, observational study to estimate the relationship between dosage of clopidogrel and platelet aggregation in Chinese with different genotype. The investigators suppose both pretreatment dosage of clopidogrel before percutaneous coronary intervention (PCI) and CYP2C19 genotype may effect the platelet aggregation as well as clinical outcome.

Inclusion Criteria:

• accept PCI in Chinese CHD patients
• expected dual antiplatelet therapy (DAPT) at least 6 months

Exclusion Criteria:

• another planned PCI within 6 months