The risk of premature heart beats depends on the type and frequency of premature beats. Frequent premature beats tend to lead to insufficient blood supply to the heart, brain, kidneys and other important organs. The risk of premature beats is not directly related to the patient’s conscious palpitations and other symptoms, but depends on the location of the ectopic pacing point, the frequency of premature beats and the presence of underlying heart disease. Premature beats can be classified as sinus, atrial, atrioventricular junction, or ventricular, depending on the origin of the premature beats. Ventricular premature contractions are the most common, followed by atrial premature contractions. Occasional atrial premature beats and ventricular premature beats with non-life-threatening origins have little impact on health, while occasional ventricular premature beats with poor origins should be treated promptly with drugs or catheter radiofrequency ablation because they may induce sudden cardiac death. The frequency of premature beats can be divided into episodic premature beats with less than 5 beats/min and frequent premature beats with more than 6 beats/min. Frequent premature beats can easily lead to insufficient blood supply to the heart, brain, kidneys and other important organs, causing chest tightness, palpitations, dizziness, weakness, and even heart failure. In healthy people, premature beats are often caused by factors such as overwork, mental stress, indigestion, emotional excitement or instability of the vegetative nervous system. Patients with underlying heart disease, such as coronary heart disease, myocarditis, rheumatic heart disease, congenital heart disease, etc., have an increased risk of sudden cardiac death if they have heart failure and premature beats at the same time. The danger of premature heartbeat needs to be judged by a professional doctor, so there is no need to be nervous when premature beats are detected.