Clinical Research Details Clinical Research The ABCD-Gene Prospective Study Study Description This investigation will be a prospective cohort study conducted in a population of 500 patients with stable CAD undergoing elective PCI treated with standard of care clopidogrel. By integrating genetic data with clinical variables, patients will be stratified into 2 cohorts based on their ABCD-GENE score (using a cut-off of 10). Assessments to define HPR status and myocardial infarction/myocardial injury will be performed post-PCI. Data will be collected and then entered into a secure database. Inclusion/Exclusion Criteria Inclusion criteria: Stable CAD undergoing elective PCI; Male or females, Age ≥ 18 years old; Troponin negative before PCI*†; Background of aspirin therapy; * Troponin negative will be defined as hs-cTn below the URL for the laboratory (Male < 22 ng/L; Female < 14 ng/L) or modestly positive hs-cTn (Male: 22-99 ng/L; Female: 14-99 ng/L) flat or decreasing from hour 0 to 3. † If troponin is unknown before coronary angiography and no clinical signs of acute coronary syndrome is present, a troponin will not be collected as this is line with standard practice. Exclusion criteria: Current presentation with myocardial infarction; On treatment with prasugrel or ticagrelor; Documented hypersensitivity to clopidogrel; Use of an intravenous antiplatelet therapy (i.e., cangrelor or GPI) during PCI; Unable to provide written informed consent. Open Enrollment Contact Name: Andrea BurtonContact Phone: (904) 244-5617Contact Email: andrea.burton@jax.ufl.edu Investigators Francesco Franchi, M.B.Ch.B. (M.D.) Medicine