- Have experienced any arterial thrombotic event or arterial thromboembolic event, including myocardial infarction, unstable angina (history or evidence of current clinically relevant coronary artery disease of current ≥Class III as defined by Canadian Cardiovascular Society Angina Grading Scale or congestive heart failure of current ≥Class III as defined by the New York Heart Association), cerebrovascular accident, or transient ischemic attack, within 6 months prior to enrollment.