CPR, or cardiopulmonary resuscitation, is an emergency rescue measure taken in the event of cardiac arrest. In the United States, the development of CPR has gone through a long process, bringing hope to countless lives.

At the beginning of the 20th century, the medical community had no effective means of dealing with cardiac arrest. At the time, it was widely believed that once a heart stopped beating, it could never start again. However, this idea was challenged in the 1950s. American doctor James-Lee Thomas discovered in animal experiments that blood circulation can be maintained through chest compressions and artificial respiration. This discovery laid the foundation for cardiopulmonary resuscitation research.

In 1958, the Journal of the American Medical Association published an article by Peter Safar and Julius Mount Nelson describing the basic steps and techniques of cardiopulmonary resuscitation. This article quickly attracted widespread attention and spawned research and promotion of CPR.

In 1960, the American Heart Association established a special group to begin systematic research on cardiopulmonary resuscitation. After many experiments and improvements, the group proposed the first formal CPR guidelines in 1967. This guideline was quickly adopted by major hospitals in the United States and promoted nationwide.

As medical technology continues to advance, cardiopulmonary resuscitation techniques and equipment are constantly being updated. In 1974, the American Heart Association introduced the Automated External Defibrillator (AED), which greatly improved the survival rate of cardiac arrest patients. Since then, CPR training has become more and more popular. Many American schools, public places and institutions have conducted CPR training courses, allowing more people to master this life-saving skill.

After entering the 21st century, the United States has achieved more results in CPR research and promotion. In 2000, the American Heart Association issued a new version of CPR guidelines, emphasizing the importance of early identification and early treatment. In addition, with the development of society and the improvement of people's health awareness, more and more people are actively participating in CPR training.

Statistics show that hundreds of thousands of cardiac arrests occur in the United States every year, but through timely cardiopulmonary resuscitation and first aid, many lives are saved. Behind this achievement is the United States’ continued efforts in CPR research and promotion.

In general, the development history of CPR in the United States is a process of continuous innovation and progress. From initial experimental research to current popularization, CPR has become an indispensable part of modern medicine. In the future, with the continuous advancement of science and technology and the continuous improvement of people's health needs, I believe that CPR technology will continue to develop and protect the lives of more people.

Key words:cpr, cpr development,cardiopulmonary resuscitation