CPR has come a long way since it was first introduced. Early methods of resuscitation began in the 1500s, ranging from whipping the unconscious person to rolling them repeatedly over a barrel. Throughout, doctors and scientific organizations discovered the methods used in the CPR process today. The Paris Academy of Sciences first recommended mouth-to-mouth resuscitation in 1740. Dr. Friedrich Maass performed the first documented instances of chest compression in 1891. Modern CPR techniques were first introduced in 1950. See the full infographic below to discover just how much has changed since 1500.