The effective indicators of chest cardiac compressions are that the patient resumes voluntary breathing and voluntary heartbeat, the radial artery and carotid artery can be palpated, the patient’s face has pallor gradually turning into redness, the pupils gradually recover, and the nails and skin color gradually return to normal. Blood pressure could be measured with a sphygmomanometer, and the blood pressure value was gradually normalized. The patient’s mental state and expression gradually return, and the respiratory rise and fall of the chest or heartbeat can be clearly seen. Chest cardiac compressions are a common method of first aid, to be used within the first facility first aid with artificial respiration, for various causes of cardiac arrest. If the patient has no voluntary breathing, no voluntary heartbeat, loss of consciousness, and blood pressure cannot be measured, chest cardiac compressions need to be performed immediately. The earlier the first aid is given, the higher the success rate. However, there are contraindications to chest compressions, such as sternal fracture or cardiac failure.