Two cardiac arrests are considered to be premature beats. Premature beats are a common cardiac arrhythmia that occurs when the heart is stimulated by something other than the sinus node. When the heart is stimulated, the heart will contract prematurely, and after the contraction, there will be a long gap, and the patient’s sensation may be that there is a cardiac arrest. Premature beats are clinically categorized into atrial and ventricular premature beats, with atrial premature beats originating from the atria and ventricular premature beats originating from the ventricles. A small number of premature beats have a relatively small effect on heart function and do not require specific treatment. Frequent premature beats, or premature beats occurring in patients with organic heart disease, should be taken seriously and may lead to worsening of the condition. Patients with premature beats should go to the hospital and improve the relevant examinations under the guidance of the physician to clarify the specific diagnosis.