Atrial fibrillation is the most common persistent arrhythmia, the incidence of which increases with age, not only causing palpitations and chest tightness, but also leading to thromboembolism, such as in the cerebral vasculature, strokes can occur, which can lead to hemiplegia and impaired limb movement; such as occurring in the peripheral vasculature, which can lead to limb ischemia, necrosis, and in some cases, amputation is also required. Therefore, if atrial fibrillation is not treated early and standardized treatment, it will cause serious consequences. Currently, the more effective antithrombotic drug for atrial fibrillation is warfarin, and different antithrombotic treatments are used depending on whether the patient has a combination of stroke risk factors. ASA : Aspirin TIA Transient ischemic attack, a type of ischemic encephalopathy LVEF An indicator for evaluating cardiac function in cardiac ultrasound However, warfarin-associated hemorrhagic events should not be ignored, especially in the elderly taking warfarin resulting in an increased risk of cerebral hemorrhage with age, thus making it difficult to adhere to, and implement, antithrombotic therapy in elderly patients with atrial fibrillation. For patients who cannot take warfarin, aspirin + clopidogrel may be considered as an alternative, which, although not as efficacious as warfarin, is still superior to those who are not antithrombotic.