Atrial fibrillation, referred to as atrial fibrillation, is one of the better common arrhythmias and is an atrial rhythm disturbance caused by the dominant folding loop of the atria causing many small folding loops. It is seen in almost all organic heart diseases and can also occur in non-organic heart diseases. It causes serious complications, such as heart failure and arterial embolism, and poses a serious threat to people’s health. Clinically, AF is classified into paroxysmal AF, persistent AF, and sexual AF according to the characteristics of AF episodes. The total incidence of atrial fibrillation is 0.4%, and the incidence of atrial fibrillation increases with age, reaching 10% in people over 75 years old. The frequency of atrial excitation in atrial fibrillation is 300-600 beats/min, and the heart rate is often fast and irregular, sometimes reaching 100-160 beats/min, which is not only much faster than the normal heart rate, but also irregular, and the atria lose their effective contraction function. Large-scale studies in China have shown that the prevalence of atrial fibrillation is 0.77%, and the prevalence of atrial fibrillation is higher in men than in women, with a prevalence of 7.5% over the age of 80. In addition, the increase in the prevalence of atrial fibrillation is closely related to the increase in coronary heart disease, hypertension and heart failure, and atrial fibrillation will become one of the more prevalent cardiovascular diseases in the next 50 years. The common causes of atrial fibrillation include hypertension, coronary artery disease, cardiac surgery, valve disease, chronic lung disease, heart failure, cardiomyopathy, congenital heart disease, pulmonary embolism, hyperthyroidism, pericarditis, etc. It is associated with alcohol consumption, stress, water-electrolyte or metabolic imbalance, and severe infections; in addition, it can be combined with other types of arrhythmias. There is no uniform definition of atrial fibrillation, but it can be divided into paroxysmal atrial fibrillation, persistent atrial fibrillation and permanent atrial fibrillation according to its duration; usually paroxysmal atrial fibrillation refers to those who can return to sinus rhythm on their own within 7 days, usually for less than 48 hours; persistent atrial fibrillation refers to those who last for more than 7 days and require drugs or electric shock to return to sinus rhythm; permanent atrial fibrillation refers to those who cannot return to sinus rhythm or recur within 24 hours after returning to sinus rhythm. Permanent atrial fibrillation refers to those who cannot be converted to sinus rhythm or recur within 24 hours after conversion. Idiopathic atrial fibrillation (AF with other underlying heart disease) and idiopathic atrial fibrillation (no underlying heart disease on clinical examination) are classified according to the presence or absence of underlying heart disease, and idiopathic atrial fibrillation often occurs in younger people, mostly younger than 50 years old. Common clinical symptoms of atrial fibrillation include: 1. palpitations: feeling a disturbed or rapid heartbeat, physical fatigue or exertion; 2. vertigo: dizziness or fainting; 3. chest discomfort: pain, pressure or discomfort; 4. shortness of breath: feeling breathless during mild physical activity or at rest; in addition, some patients may not have any symptoms. Some patients may need to avoid caffeine-containing substances such as tea, coffee, cola, and some over-the-counter medications, and be cautious with certain cough or cold medications, which may contain stimulants that may promote irregular heart rhythms. Ask your doctor or read the instructions before taking them to see if they are suitable for you.