What is the first step to take in a medical emergency according to SABC principles?

The first step to take in a medical emergency, according to SABC principles, is to assess the scene for safety. This is crucial because ensuring the safety of both the responder and the casualty is the foundational element of any emergency response. Before any medical intervention is attempted, it's essential to make sure that there are no ongoing hazards, such as traffic, fires, or potential violence, that could put anyone at risk.

If the environment is not safe, further actions could exacerbate the situation or lead to additional injuries. Once safety is confirmed, responders can then proceed with assessing the casualty, calling for assistance, and providing necessary first aid. This proactive approach to safety ultimately lays the groundwork for a successful emergency response.