There is no such thing as how many premature beats a day is the normal range. Premature beats are also called preterm contractions, and the first thing a patient with premature beats should know is whether the patient has atrial premature beats, atrioventricular junction premature beats, or ventricular premature beats. Next, it is important to note whether the patient has a clear underlying heart condition. Episodic atrial premature beats and premature beats in the atrioventricular junction area generally do not cause serious hemodynamic disturbances, and the prognosis is generally good. Only when atrial premature beats and premature beats in the AV junction area are frequent or cause symptoms such as palpitations (rapid heartbeat, often accompanied by panic) do they need to be treated with medication. Premature ventricular contractions are a common heart rhythm disorder. If the patient does not have a clear underlying heart disease, but the ventricular premature beats exceed 10,000 beats/24 hours, it tends to cause the heart to enlarge, and then the ventricular premature beats need to be controlled. However, in patients with a clear underlying heart disease, there is a risk of inducing a malignant arrhythmia, which may lead to sudden death, regardless of the number of premature ventricular beats. Premature beats may also be due to physiologic causes, such as excessive alcohol consumption and drinking strong tea. Therefore, when patients experience premature beats it is recommended that they seek prompt medical attention to identify the cause and treat it promptly.