Knowing how to perform both methods of CPR (cardiopulmonary resuscitation) on an adult could save a life. However, the recommended method for performing CPR has changed relatively recently, and it is important to know the difference. In 2010, the American Heart Association made a radical change to the recommended CPR process for victims of cardiac arrest[1] after studies showed that compression-only CPR (no mouth-to-mouth breathing) is as effective as the traditional approach.