The indications for effective resuscitation in cardiac arrest are as follows: 1) the patient’s carotid artery beats evenly and strongly, and you can choose to listen to the recovery of the patient’s heart sounds in the chest area; 2) the patient’s breathing returns to normal, and the ear can hear breathing sounds close to the patient’s mouth and nose, and the thorax has heaving; 3) the color of the patient’s mucous membrane of the mouth and lips becomes red and moist, usually due to hypoxia, cardiac arrest patients can be accompanied by changes in the color of the face, such as cyanosis, and the patient’s face will return to red and moist after successful resuscitation; 4) the patient’s pupils appear light reflex; 5) other reactions such as eye movement and limb movement appear.