A medical emergency occurs when a sudden illness, condition, or incident, such as a heart attack, necessitates immediate medical intervention and attention. You can identify an emergency by observing certain indicators or signs, including: Medical emergencies can occur anywhere and at any time, whether at work, home, on the road, or even during sports activities. Recognising an emergency is the crucial initial step in responding effectively to the situation. In this section we will learn how to administer CPR and use automated external defibrillators (AEDs) effectively.