Atrial fibrillation, referred to as atrial fibrillation, is the most common persistent arrhythmia, with an overall incidence of 0.4%. The incidence of atrial fibrillation increases with age, reaching 10% in people over 75 years of age. In atrial fibrillation, the frequency of atrial excitation is 350 to 600 beats per minute, the atria fibrillate rapidly and irregularly, and the atria lose their effective contractile function. Patients with atrial fibrillation may have symptoms such as panic, shortness of breath, chest tightness, breathlessness and dizziness, or no obvious discomfort, which is often considered a normal physiological reaction to sudden cold weather in the north, and many people tend to put up with it and pass. In fact, this is the first thing that can happen with atrial fibrillation. As a common arrhythmia disease, the danger of atrial fibrillation lies not only in the heart, but also in greatly increasing the risk of blood clots and strokes. During an episode of atrial fibrillation, the atria are unable to pump blood efficiently, and the risk of thrombosis is increased when blood is trapped in the atria. If the clot leaves the heart and enters the circulation, it can block an artery and cause disruption of the blood supply to vital organs. Once the clot flows into the cerebral arteries it can lead to a stroke. The consequences of cerebral infarction caused by atrial fibrillation are even more serious, with a high rate of disability and death. How can early detection be achieved? Raise people’s awareness of atrial fibrillation and self-care; for people who do not have medical knowledge, they can feel their own pulse, or electronically measure their pulse to observe large changes in pulse rate, a simple and effective way to do electrocardiography, or go to the hospital to perform dynamic electrocardiography.