Atrial fibrillation is very common in our lives, especially in the elderly population, where it is very common. The probability of developing atrial fibrillation is very much related to the age of the person. The main symptom of atrial fibrillation is that the heart rate is very fast and irregular, and the contractile function of the atria is greatly reduced. In addition, the incidence of atrial fibrillation is also closely related to coronary heart disease, hypertension and heart failure. Atrial fibrillation symptoms a. Clinical performance characteristics of paroxysmal atrial fibrillation Paroxysmal atrial fibrillation is relatively common, especially in male patients is a high incidence, generally is no organic heart disease, paroxysmal atrial fibrillation its most important feature is that the episodes are very frequent, and the dynamic electrocardiogram can last from a few seconds to several hours. Most of the inter-systolic intervals are <500 ms, and there is often a P-on-T phenomenon. However, in younger patients with AF, the number of episodes is relatively small. In paroxysmal atrial fibrillation, some patients do not have a fast heart rate and are usually asymptomatic. In some patients, the heart rate is fast, and the patient complains of palpitations, panic, chest tightness, shortness of breath, irregular heartbeat, irritability, and weakness. On auscultation, the heart rhythm is irregular, the heart sounds vary in strength and speed, the pulse is short and clumsy, and polyuria is present. If the ventricular rate is too fast, it may lead to lower blood pressure and even fainting. Atrial fibrillation symptoms 2, persistent and chronic atrial fibrillation clinical performance characteristics Persistent and chronic atrial fibrillation is very much related to the heart, it is not related to the ventricular fast and slow, but will also appear palpitations, shortness of breath, chest tightness, weakness and other symptoms, especially after engaging in internal work ventricular significantly increased, and also syncope, especially in elderly patients, it is easy to appear brain hypoxia and vagal hyperactivity caused by . The most obvious symptom of persistent and chronic AF is irregular heart rhythm: for example, uneven intensity and intervals of the 1st heart sound. If the untreated AF ventricular rate is generally in the range of 80 to 150 beats/min, it is difficult to exceed 170 beats/min. A heart rate >100 beats/min is called tachy AF; >180 beats/min is called very rapid AF with pulse short clumsiness. The above is what we said about the clinical performance characteristics of different types of atrial fibrillation, atrial fibrillation in our life or belong to the high incidence. It is mainly divided into three types: paroxysmal atrial fibrillation, persistent atrial fibrillation and permanent atrial fibrillation. Atrial fibrillation that can recover on its own within 7 days is paroxysmal atrial fibrillation, which usually lasts less than 48 hours. Persistent atrial fibrillation usually lasts for more than 7 days and requires medication or electric shock to recover from sinus rhythm. Permanent atrial fibrillation cannot be converted to sinus rhythm or recur within 24 hours after conversion. Therefore, we should pay attention to prevention in our daily life.