Anyone can—unfortunately—find themselves in such a situation: a person collapses in front of you and is unresponsive. Many people then rely on a system that is extremely professional in this country: the emergency medical services. Staffed and equipped to a very high standard by international comparison, an ambulance still requires a certain amount of time to reach the scene and then the patient. In many life-threatening emergencies such as heart attack, stroke, or similar, this response time is generally sufficient—but not in the case of cardiac arrest. Irreversible brain damage occurs in the patient after just 3–5 min. Thus, survival depends not only on a professional emergency service, but above all on each individual who finds themselves in such a situation. The first minutes after the onset of cardiac arrest are critical for survival. The necessary actions are fundamentally simple, and even children and adolescents can successfully perform them.