Timing, importance and project overview of cardiopulmonary resuscitation. Cardiopulmonary resuscitation, or CPR, was born in the 1960s. In the past four years, with the popularization of cardiopulmonary resuscitation knowledge and the development of first aid technical training, the success rate of resuscitation has been continuously improved, and 50% of cardiac arrest occurred outside the hospital. Therefore, first aid is very important. The public should be trained in CPR. The project advocates the development of public participation in defibrillation. Cardiopulmonary resuscitation is an emergency medical measure for cardiac arrest, including artificial respiration, chest compressions and early electric defibrillation.