Beijing, November 13 (Xinhua) Li Guangping, director of Tianjin Institute of Cardiology and director of Department of internal medicine of the second hospital of Tianjin Medical University, visited Xinhua health lecture hall recently. He said that atrial fibrillation is a common arrhythmia with complex etiology. Most patients are caused by many factors, and the etiology is not clear. < p > < p > Li Guangping said that the harm of atrial fibrillation is very great. Atrial fibrillation itself can cause stroke and heart failure. Due to the complex mechanism and etiology of atrial fibrillation, middle-aged and elderly patients complicated with a variety of diseases, such as hypertension, diabetes, and bad living habits such as drinking, need more comprehensive treatment. In addition, because atrial fibrillation can cause structural changes, which are often irreversible, it is very difficult to treat. < / P > < p > how to judge whether they have atrial fibrillation or not, Li Guangping pointed out that when patients with atrial fibrillation attack, experienced doctors can judge whether the patients have atrial fibrillation through stethoscope; if the symptoms are not obvious, they can be detected by ECG; if the patients usually do not have attacks, but have a burst of attacks, then they need to carry the whole 24-hour ECG detection; If the patient has a very infrequent attack, which may occur once or twice a month, it can be detected by subcutaneous implantation to completely record the number of AF episodes in the patient and how long each time. So the diagnosis of AF is not difficult.