Arrhythmia is also a manifestation of heart disease, so arrhythmia is considered a type of heart disease and is not a precursor. Arrhythmia is caused by abnormal heart conduction function. If it is sinus arrhythmia, it may be caused by physiological factors and is usually harmless. In normal people, it can be triggered by eating too much, overexertion, etc. If the arrhythmia is due to other arrhythmias, it is commonly caused by heart diseases such as insufficient blood supply, atrioventricular block and ventricular pre-phase contraction. Therefore, once the arrhythmia is combined with panic, palpitations, chest tightness and pain in the precordial region, patients are advised to consult a doctor promptly, have an electrocardiogram and 24-hour electrocardiogram performed to clarify the diagnosis, and under the guidance of a doctor, undergo antiarrhythmic treatment. In daily life, avoid overwork and overstimulation, do not be overly nervous and anxious, avoid tobacco, alcohol, strong tea, coffee and other stimulating beverages, pay attention to rest and ensure sufficient sleep.