1, palpitations, atrial fibrillation occurs often accompanied by irregular rapid heartbeat, patients mostly have obvious panic, shortness of breath and weakness and other symptoms, seriously affecting the quality of life. 2, patients with atrial fibrillation are highly susceptible to stroke, which not only increases the incidence ratio by more than 5 times, but also makes the treatment of stroke sequelae more difficult. In addition, the incidence of dementia and mortality rate in patients with atrial fibrillation are also significantly higher. 3, cerebral infarction, because atrial fibrillation persistently makes the atria have blood stagnation, easily lead to the formation of thrombus in the atria, part of the thrombus off can cause embolism of the body circulation, especially cerebral embolism is the most common. Therefore, patients with atrial fibrillation suffer from cerebral infarction about 4-7 times more than people with normal heart rhythm. 4, heart failure, long-term atrial fibrillation will lead to a lack of effective contraction of the atria, but instead of an ineffective uncoordinated contraction, the heartbeat is extremely irregular, incomplete filling of the ventricles, cardiac blood displacement significantly reduced, these ineffective contraction not only can not discharge blood into the arteries to maintain normal blood circulation, but to consume the energy of the myocardium, so over time, easy to cause heart failure. 5, atrial fibrillation patients are prone to a variety of respiratory infections. Once atrial fibrillation is combined with infection, it will further increase the load on the heart and cause or aggravate heart failure.