The harms of arrhythmia to people differ according to different types of arrhythmia, mainly manifested as chest tightness, dizziness, shortness of breath, blurred vision and other harms, which may lead to sudden death in serious cases. 1. Sinus arrhythmia: patients are prone to palpitation, chest tightness, dizziness, headache, fatigue, as well as insufficient blood supply to the heart and brain, such as the seriousness of the condition, fainting, falling, and even endanger the patient’s life. 2. Atrial arrhythmia: manifested by shortness of breath, chest tightness, dyspnea and chest pain. Atrial flutter and atrial fibrillation can easily lead to thrombosis, and too fast can easily induce and aggravate heart failure or angina pectoris. 3. Junctional arrhythmia: Dizziness, shortness of breath, blurred vision and other symptoms, the brain and nervous system can not get enough oxygen and blood, which may lead to paroxysmal epilepsy. 4. Ventricular arrhythmia: such as ventricular tachycardia and ventricular fibrillation, which can easily jeopardize life and cause symptoms such as fainting and sudden death. 5. Conduction block of the heart: manifested as dizziness, fainting, angina pectoris and heart failure, etc. If ventricular rate is too slow leading to cerebral ischemia, the patient will suffer from temporary loss of consciousness, which will trigger convulsions. If the patient has uncomfortable symptoms, he should seek medical treatment in time and standardize the treatment under the guidance of the doctor.