The purpose of high-quality cardiopulmonary resuscitation, also known as advanced cardiac life support, is to stabilize the patient’s basic vital activities and promote the restoration of the patient’s voluntary heartbeat and respiration. In clinical practice, it usually includes the following aspects: 1. Effective chest compressions: After judging that the patient’s heartbeat and respiration have stopped, start chest compressions, noting that the recognition time should not exceed 10 seconds. Place the patient on a hard surface and press at the lower part of the sternum, or the intersection of the midline of the sternum and the line of the two nipples, and press with the palm root. Press the arm perpendicular to the patient’s chest wall, straighten the arms, do not bend, press the depth at 5-6 cm, and press the frequency at 100-120 times/min. Minimize the interruption of compressions, while maintaining adequate compression depth and compression frequency; 2. Artificial respiration: before reaching the hospital, artificial respiration needs to be given. Make the patient’s head tilted to the side, clear the mouth and nasal secretions, and after the head is reset, take the tilt and lift method or the jaw-hold method to open the airway and perform artificial respiration. Note that the frequency of chest compressions and ventilation is kept at 30:2; 3. Establish artificial airway and give mechanical ventilation: the establishment of artificial airway is mainly done through tracheal intubation. The application of mechanical ventilation can ensure the body’s demand for oxygen and avoid prolonged hypoxia, which can cause irreversible damage to the heart, brain, kidneys and other important organs. The general ventilation frequency is 10 times/minute to avoid hyperventilation; 4. Defibrillation resuscitation or pacing therapy: for patients with ventricular fibrillation and without chronic ventricular tachycardia, electric defibrillation therapy needs to be given promptly. For patients with cardiac arrest, immediate temporary pacing therapy is required on the basis of CPR; 5. Establish intravenous access and give resuscitation drugs: In CPR, the common route of drug administration is intravenous access. If intravenous access cannot be established in a timely manner for some reason, intra-medullary injection of drugs can also be considered, and direct intracardiac injection of drugs is not currently advocated. The drugs commonly used in CPR include epinephrine, vasopressin, amiodarone, lidocaine, etc. Among them, epinephrine is the most widely used and is suitable for all types of cardiac arrest.