When a patient suffers cardiac arrest in the ward, the first health care worker to find it will perform chest compressions and call out to colleagues to help, who will first get on the cardiac monitor, get the defibrillator, push the resuscitation cart, and get the intubation kit. If the patient is in ventricular fibrillation or pulseless ventricular tachycardia, the defibrillator will first electrically defibrillate the patient as soon as it is in hand, then continue chest compressions for 30 times after defibrillation, open the airway and then use the balloon mask for artificial respiration twice, and quickly determine after five cycles whether the defibrillation is successful and whether to continue compressions and defibrillation. At the same time, the nurse on the other side quickly lanced the patient, established intravenous access, and prepared resuscitation drugs epinephrine, two defibrillation was unsuccessful, still need defibrillation will put epinephrine on, and began to prepare the tracheal intubation on the ventilator. If the third defibrillation is still unsuccessful, the patient is considered to be in persistent ventricular fibrillation, and the antiarrhythmic drug amiodarone or lidocaine is administered. If the patient’s cardiac arrest is due to other arrhythmias that do not require defibrillation, direct chest compressions 30 times with two balloon masks, epinephrine, and preparation for tracheal intubation on the ventilator will be performed, and resuscitation will still be judged after five cycles. After intubation on the ventilator, there is no need to interrupt cardiac compressions, use epinephrine every 3-5 minutes, judge the effect of resuscitation every two minutes, and stop compressions after the heartbeat is restored.