Premature beats may or may not be serious. The severity of premature beats depends on the pattern and number of premature beats, and the accompanying symptoms. 1. The pattern and number of premature beats: Generally speaking, single premature beats are not serious, while multiple premature beats are relatively serious. Episodic premature beats are often not serious. They may occur tens, hundreds or thousands of times throughout the day, and can be cured after removing the triggers. However, frequent premature beats, such as 24-hour ventricular premature beats, the number of premature beats throughout the day reaches 1-2 million, often affect the blood supply to the myocardium, and may cause malignant arrhythmia, these cases are more serious, and often belong to the organic premature beats, and it is recommended to consult a doctor as soon as possible. 2. Accompanying symptoms: premature beats without obvious accompanying symptoms are often not serious and can be cured by themselves; however, if premature beats are accompanied by palpitations, chest tightness, chest pain, dizziness, headache and other symptoms, it suggests that premature beats are more serious, and have already affected the blood supply of the heart, resulting in ischemia of the body circulation. In addition, malignant premature beats will appear pale, cold limbs and may even drop blood pressure, causing serious hemodynamic changes, the condition is very serious, need to go to the hospital as soon as possible.