In the field of healthcare, it is essential to understand the various aspects of providing care for multiple casualties and in the event of disasters, within the professional field of emergency medical services. This course therefore aims to provide the necessary knowledge to to describe semi-automatic external defibrillators (SAEDs), its components and how it works, as well as for administer defibrillation in accordance with the protocol and, where appropriate, to assist with the initial care for a person suffering from a cardiac arrest (CA).