Low-dose Versus Standard-dose Rivaroxaban in Elderly Patients With Atrial Fibrillation

This trial compares a lower dose of rivaroxaban (a blood thinner) to the standard dose in older adults with atrial fibrillation, to see if a lower dose is just as effective but causes less bleeding. **You may be eligible if...** - You are 70 years or older - You have atrial fibrillation confirmed by ECG or Holter within the past year - Your stroke risk score (CHA2DS2-VASc) is high enough to require a blood thinner - You are able to sign an informed consent form **You may NOT be eligible if...** - You have moderate-to-severe mitral valve disease, a mechanical heart valve, or a left heart clot - You had a severe stroke recently (within 3 months) or any stroke in the past 14 days - Your atrial fibrillation is due to a temporary reversible cause (like after surgery) - You have plans for atrial fibrillation ablation or left atrial appendage closure in the next 3 months Talk to your doctor to see if this trial is right for you.