Usually it is not recommended for patients with atrial fibrillation to drink alcohol, including a small amount of alcohol and a large amount of alcohol are not good for atrial fibrillation, the specific reasons are as follows: Firstly, because after drinking alcohol, patients will cause an increase in sympathetic nerve tone, when the sympathetic nerve is over-excited, the patients will have varying degrees of increase in blood pressure, and after the increase in blood pressure, there will be cardiac arrhythmia, which can aggravate the atrial fibrillation. Secondly, after sympathetic nerve excitation, myocardial contractility will increase, cardiac conduction speed will increase, cardiac oxygen consumption will increase, cardiac contractility will increase, at this time, the patient will have an imbalance of oxygen supply and demand, which will further aggravate arrhythmia and lead to atrial fibrillation attacks. Thirdly, after drinking alcohol, patients will also experience imbalance in the body’s neurological-fluid-endocrine system, which will further aggravate the arrhythmia. Therefore, patients with atrial fibrillation are not recommended to drink alcohol in small amounts.