Which action should be taken if someone is experiencing persistent chest pain?

When someone is experiencing persistent chest pain, the most critical action to take is to call EMS immediately. Persistent chest pain can be a sign of a serious medical condition, such as a heart attack, and prompt intervention is essential. Emergency Medical Services (EMS) are trained to handle such situations and can provide the necessary medical assistance, including advanced care and transport to a hospital if needed.

Calling EMS prioritizes the person’s safety and ensures that professional help is on the way while you can provide support or perform any necessary first aid measures. This response is crucial because delaying help for persistent chest pain could lead to serious complications or worsen the individual's condition.

Other actions, such as offering water, encouraging movement, or waiting to see if the pain goes away, would not be appropriate in this scenario as they could potentially exacerbate the individual's condition or delay critical treatment.