Atrial fibrillation raises the risk of ischemic stroke by a factor of four to five, primarily as a result of cardioembolism of a fibrin-rich thrombus (Figure 1).

• 房颤通过四至五个危险因素之一增加缺血性卒中的发生率（图一）,主要是因为富含纤维蛋白血栓形成心脏栓塞导致的。