Malignant arrhythmias are usually sudden and can cause very serious symptoms. For example, after ventricular tachycardia or ventricular fibrillation, the patient may suddenly fall to the ground, and the patient may lose consciousness, and the patient’s breathing, heartbeat and pulse may disappear. The specific treatment methods are as follows: 1. After the patient is detected, cardiopulmonary resuscitation, chest compressions and other resuscitation treatments should be performed immediately. After resuscitation, if the patient’s condition is stable, the cause of the malignant arrhythmia should be clarified as soon as possible and the cause should be controlled. If acute heart attack is caused by coronary artery disease, the patient’s blood vessels should be opened immediately, and coronary angiography and coronary stenting should be performed. If the patient is suffering from electrolyte disorders, such as severe hypokalemia, hyperkalemia, or severe acidosis leading to malignant arrhythmias, control the cause by controlling the electrolytes and the stability of the internal circulation; 3. 3. If malignant arrhythmias recur, antiarrhythmic drugs should be actively used for treatment. The application of drugs varies for different types of arrhythmias and requires the guidance of a medical professional.