The judgment criteria of cardiac arrest mainly include the patient’s symptomatic manifestations and ECG monitoring. Clinical medicine shows that when a patient suffers from cardiac arrest, he or she will suffer from generalized convulsions, respiratory difficulties, rigidity of the limbs, purplish-red lips and the whole body, and the patient will gradually lose consciousness, and the pulse will gradually become weaker and weaker until it disappears, resulting in a state of shock. In addition, the patient cardiac arrest in the cardiac monitor will blood pressure drops sharply, blood pressure and heart rate show a straight line, so to determine whether the patient belongs to the cardiac arrest, we need to consult a doctor in time when the patient has a weakening of the pulse, generalized convulsions, generalized chills and other symptoms, combined with the cardiac monitor to monitor the patient’s heart rate and blood pressure. At the same time, when the patient has a cardiac arrest, timely cardiac resuscitation through a combination of chest compressions or artificial respiration for the patient, timely resuscitation.