A premature beat is a type of arrhythmia, which is often referred to as an arrhythmia. It is a heart beat produced by an ectopic rhythm giving out impulses outside of a person’s normal rhythm. To put it plainly, the heart beats 60-100 times per minute / minute, regular beating is issued by the heart of the command of the command, this command is called the sinus node, sinus node is very regular, regular issuance of impulses. However, in addition to the sinus node, there are other structures and components of the heart, in normal times, there is no component of the heart beating in the heart, but in abnormal circumstances, such as excessive stimulation, ischemia or drug intoxication and so on a series of circumstances, resulting in addition to the sinus node other parts of the heart tissues and structures to produce beat, beat will appear in advance, this early emergence of the heart This premature heart beat is an irregular beat on the basis of the regularity of the sinus node, the human body will feel a sense of shedding and the heart’s obvious throbbing sensation, this situation is called premature beat. According to the different sites of issuance, premature beats can be divided into atrial premature beats issued by the atria, ventricular premature beats issued by the ventricles, and premature beats issued at the junction of the atria and ventricles in the junction zone, premature beats according to the presence or absence of comorbidities, the frequency of issuance, and, in general, will produce different clinical symptoms, and some people may have never had any symptoms, and it is only in the medical examination of the electrocardiogram that they discover this condition.