Reanimation is a resuscitation measure that becomes necessary due to respiratory or cardiovascular arrest. During resuscitation, in addition to cardiac massage and ventilation, various methods are used to reactivate and support the circulation. First responders, paramedics or physicians first check whether the affected person is breathing. If this is not the case, resuscitation must be started immediately. Successful resuscitation helps to prevent vital bodily functions and metabolic processes from failing over a longer period of time and irreversibly damaging organs and tissue. During resuscitation, rib fractures and organ injuries often occur during cardiac massage. The aim of resuscitation is to restore the heart of the lifeless person to a normal beating rhythm. For this purpose, a defibrillator is often used – if in the immediate vicinity – which restores or normalizes the heartbeat by means of targeted electric shocks.