Cardiac arrest is a clinical emergency, now at home and abroad to popularize the knowledge of cardiopulmonary resuscitation, if the patient encountered cardiac arrest in public places, must not panic. Immediately in situ so that the patient fell flat on the hard surface of the bed or on the ground, and then on-site cardiopulmonary resuscitation manual compression, the frequency of every 30 cardiac resuscitation, to do artificial respiration 2 times, the use of medication to be immediate, and at the same time, to call 120, please professional health care personnel to do, for cardiopulmonary resuscitation of a follow-up treatment.