When was CPR invented?

Peter Safar and James Elam invented mouth-to-mouth resuscitation in 1956. However, what is known as cardiopulmonary resuscitation (CPR) today was developed in 1960. The American Heart Association became the forerunner of CPR training for physicians, as well as the public.

Source:

American Heart Association: History of CPR

https://twitter.com/monicarobins/status/424292660199710720

Massachusetts Institute of Technology: Peter Safar, Cardiopulmonary Resuscitation (CPR)