CPR feedback has come a long way since the development of the world’s first CPR manikin. Prior to 1960, many unusual methods were used to treat victims of sudden cardiac arrest. Intuitively, people knew that there was something that could be done to revive victims – and then science proved them right. Here’s a look at the history of CPR feedback through the lens of the most recognizable and “most kissed” woman in the world – Resusci Anne.