The main complication of atrial fibrillation (AF) patients is stroke. Atrial fibrillation combined with stroke: treatment decision is the key, high-risk patients can apply drugs, electric cardioversion or catheter ablation to convert sinus rhythm, also need long-term warfarin effective anticoagulation. According to statistics, in China, there is one new case of stroke every 15 seconds, one person dies of stroke every 21 seconds, and 75% of the 6-7 million surviving stroke patients have varying degrees of disability. For stroke, risk factors can be controlled and prevented, however, in China, there is a huge population behind each risk factor: 200 million hypertension, 200 million dyslipidemia, 92.04 million diabetes, 60 million obesity, 350 million smokers. If these risk factors are not controlled, the consequences are unimaginable. To promote stroke prevention, the Ministry of Health and the Neurology Branch of the Chinese Medical Association have designated November 20, 2007 as “China Stroke Education Day”. The aim of this day is to raise public awareness of the need to call 120 immediately after a stroke. The main complication for patients with atrial fibrillation (AF) is stroke. According to the Framingham study, the risk of stroke was 5.6 and 17.6 times higher in non-valvular and valvular combined AF compared to controls. The risk of embolism in non-valvular atrial fibrillation is 5% per year, which is 2 to 7 times higher than the incidence in patients without atrial fibrillation and accounts for 15% to 20% of all stroke events. About 1 in 6 stroke patients are AF patients. In a study by Professors Hu Dayi, Ma Changsheng and Yang Yanzong, the incidence of stroke was 5.3% in 70-year-old patients with non-valvular atrial fibrillation; the incidence of stroke in hospitalized patients with atrial fibrillation reached 24.8% and tended to increase with age, with a prevalence of stroke of 32.86% in patients over 80 years of age; strokes due to atrial fibrillation accounted for 30% of stroke patients hospitalized in neurology.