The severity of the arrhythmia is related to the patient’s own condition; if the arrhythmia is caused by a physiological state, it usually does not matter, if it is caused by a pathological cause and the patient has serious complications, it is more important at this point. It usually leads to abnormal blood circulation, sinus block, sudden death and other hazards. 1. Abnormal blood circulation: When the patient develops arrhythmia, it may change the contraction program of the atria and ventricles, resulting in a reduction of cardiac output by about 30%, leading to symptoms such as cardiac weakness, weakness and chest tightness. 2. Sinus block, sinus arrest and bradycardia: When a patient develops an arrhythmia, he or she may develop bradycardia-tachycardia syndrome, also known as slow tachycardia syndrome. 3. Sudden death: When a patient develops arrhythmia, it may lead to sudden death. The highest probability of sudden death is caused by ventricular tachycardia, ventricular fibrillation and conduction block. When symptoms of arrhythmia appear, you should seek medical treatment in time and actively cooperate with your doctor for treatment.