Atrial premature beat is a type of arrhythmia, which can present symptoms such as palpitation, panic, chest tightness, precordial discomfort, and fatigue; it can lead to other harms of arrhythmia. 1. Symptoms: patients may experience palpitations, discomfort in the precordial area, and feel that the heartbeat is fast and strong during the attack; panic, which is characterized by fast, slow or irregular heartbeat; chest tightness, discomfort in the precordial area, feeling that there is something pressing on the chest, which can cause faster breathing rate and deep breathing; fatigue, feeling that the whole body has no strength, and the mental state is relatively poor. 2. Harm: atrial premature beat may cause patients to develop other arrhythmias. Frequent atrial premature beat is more likely to cause complications, which commonly include cardiomyopathy, atrial flutter, atrial fibrillation, atrial tachycardia and so on. Appeal symptoms, it is recommended to go to the hospital in a timely manner, under the guidance of the physician, to clarify the cause and give targeted treatment.