Atrial fibrillation (AF) is now a major complication in patients with chronic heart disease. If AF is not corrected with timely treatment, blood stagnates in the atria and blood clots can easily form. The incidence of stroke in China is increasing year by year, and one of the reasons is related to not knowing how to prevent atrial fibrillation. One: Keeping a happy state of mind is the most basic in the prevention of atrial fibrillation. Because the sympathetic nerves in the body will activate when people are nervous, which can promote the occurrence of rapid atrial fibrillation; Second: control weight, increase regular physical activity. Studies have shown that obese patients have a significantly higher incidence of persistent atrial fibrillation; Third: Stop smoking and limit alcohol consumption. The risk of atrial fibrillation in people who are smokers is twice that of non-smokers, and quitting smoking can reduce the risk of atrial fibrillation. Alcohol consumption can also increase the risk of atrial fibrillation, alcohol consumption is a clear trigger for the onset of some patients with atrial fibrillation, and the dose of alcohol consumption and the prevalence of atrial fibrillation is significantly correlated with the amount of alcohol intake per day increased by 10 grams, the risk of atrial fibrillation increased by about 8%, and long-term large amounts of alcohol consumption can lead to alcoholic cardiomyopathy, heart failure, inability to tolerate daily activities, walking up the stairs, lifting things can be caused by a significant wheezing, and serious cases can not even lie down! The most serious cases can’t even lie down. Therefore, quitting smoking and drinking is very important for the prevention of atrial fibrillation; Fourth: Limit or avoid taking caffeine-containing substances in large quantities over a long period of time. Such as tea, coffee, cola and some over-the-counter drugs. Be careful with certain cough or cold medications, as they may contain stimulants that can trigger irregular heart rhythms, and you should ask your doctor or read the instructions carefully before taking these medications; Fifth: Control risk factors. Hypertensive patients should actively control the level of blood pressure, and frequent monitoring, so that blood pressure is maintained at a reasonable level, reduce blood pressure fluctuations, because long-term elevated blood pressure can cause atrial enlargement, atrial fibrosis, leading to the occurrence of atrial fibrillation, so far high blood pressure is the most common risk factors for atrial fibrillation and concomitant diseases; diabetic patients should be made to achieve the standard of blood glucose through exercise, dietary control, medication, etc.; patients with coronary heart disease should be Regular medication, control the level of blood lipids, to prevent the occurrence of myocardial infarction; if there is a serious heart valve disease patients, need to consider early surgical treatment.