Timeline of antithrombotic therapy in atrial fibrillation and coronary artery disease. For patients with high thrombotic risk (including ACS), ≥3 months (and ≤12 months) of clopidogrel and ≤1 month of aspirin (ASA) is recommended. Longer courses of clopidogrel use may be appropriate for patients with high ischemic risk or who experience an ACS. For PCI for stable angina, a shorter course of clopidogrel and ASA (≤7 days) may be more appropriate (indicated by dark shaded arrows).