Premature ventricular contractions are very common arrhythmias. The reason why premature ventricular contractions occur starts with the normal rhythm of the heart. It is well known that the heart works hard for us from birth and has a regular rhythm and is well organized and disciplined. The normal rhythm of the heart is sinus rhythm because the normal pacing of the heart is in the sinus node. In addition to the sinus node, the atria, atrioventricular node and ventricles all have pacing functions and are usually managed by the sinus node, the commander of these parts. As the name implies, premature ventricular beats are the result of ventricular desertion. Benign ventricular premature is divided into benign and malignant two, benign ventricular premature as long as there are no symptoms without treatment, malignant ventricular premature as long as timely medical treatment can be well controlled. Therefore, the discovery of ventricular premature does not need to be nervous, timely medical consultation and doctor to find the cause of ventricular premature and the right medicine is essential.