Sinus rhythm is the rhythm caused by the sinus node issuing impulses to control the heart, which is a normal rhythm. Premature beats are a common arrhythmia that can be caused by physiological causes or seen in pathological elements, such as organic heart disease, fever, anemia, electrolyte disorders, etc. A suitable treatment plan needs to be determined according to the cause, type and frequency of premature beats. I. Physiological elements: such as emotional tension, excitement, staying up late, smoking, drinking alcohol, drinking strong tea and coffee, etc., may cause premature beats plus sinus rhythm, which generally occur infrequently and patients may occasionally experience discomfort such as heartburn, and the symptoms are not serious. The main reason should be to remove the trigger, you can adjust your emotions, avoid emotional tension and excitement, keep enough sleep, don’t stay up late, smoke and drink alcohol, drink strong tea and coffee, after these measures premature beats can generally disappear on their own. Pathological factors: 1. Organic heart disease: congenital heart disease, rheumatic heart disease, coronary heart disease, pulmonary heart disease, dilated cardiomyopathy and other organic heart disease may cause premature beats plus sinus rhythm, which requires electrocardiogram, dynamic electrocardiogram, cardiac ultrasound and other examinations to understand the type of premature beats, frequency and type of heart disease. If the frequency of premature beats is high, anti-arrhythmic drugs such as amiodarone and propafenone can be used to treat the beats, while organic heart disease should be treated, such as congenital heart disease and rheumatic heart disease can be treated by interventional surgery, coronary heart disease can be treated by nitrate drugs such as nitroglycerin and anti-platelet drugs such as aspirin, or coronary intervention. Or coronary intervention; 2. Other diseases: including fever, anemia, electrolyte disorders, hyperthyroidism, etc. These diseases may lead to increased excitability of sympathetic nerves in the body, resulting in autonomic disorders, causing disturbances in the electrical activity of the heart, leading to premature beats plus sinus rhythm. Incidental premature beats should be treated for the cause, such as fever can be relieved by antipyretic and analgesic drugs such as ibuprofen, electrolyte disorders, especially low potassium, should be replenished by oral potassium chloride or intravenous potassium chloride drip, and hyperthyroidism can be normalized by using anti-thyroid drugs such as methimazole and propylthiouracil. Generally, by actively treating the primary disease, occasional premature contractions will disappear. For frequent premature contractions, anti-arrhythmic drugs such as metoprolol tartrate injection can be used for treatment based on the treatment of the primary disease.