The heart rate of atrial fibrillation is characterized by symptoms such as absolute irregularity of the heart rhythm, strong and weak heart sounds, and a short pulse. 1. Absolute rhythm irregularity: the heart rate of patients with atrial fibrillation and its rhythm fluctuation is relatively large, sometimes it can be about 60 beats per minute, or even slower. But when it is fast, it can reach more than 150 beats per minute or even faster, and the amplitude of its beating is very large and the rate is absolutely irregular. 2. Auscultation of heart sounds: the strength of each heart contraction is different in patients with atrial fibrillation. 3. Short pulse: Because each contraction of the heart is not the same, the amount of blood ejected from the heart at one time is not the same, resulting in a short pulse. Patients with atrial fibrillation usually experience chest tightness, fatigue, fainting and blackouts. If atrial fibrillation occurs, it is important to go to the hospital.