When did the term first come into use in CPR training?

Cardiopulmonary resuscitation (CPR) training has evolved over time, and the specific terminology used has changed accordingly. The term "CPR" itself first appeared in the medical literature in the early 1960s, but it was not until the late 1960s and early 1970s that it became widely used in CPR training. Prior to this, the term "mouth-to-mouth resuscitation" was commonly used to refer to the technique of providing rescue breathing. The term "CPR" was adopted as a more comprehensive and accurate description of the procedure, which includes both chest compressions and rescue breathing.