Which abbreviation refers to a portable device that checks heart rhythm and can deliver an electric shock?

The abbreviation that refers to a portable device designed to check heart rhythm and deliver an electric shock is AED, which stands for Automated External Defibrillator. This device is crucial in emergency situations, especially when a person is experiencing a cardiac arrest. An AED analyzes the heart's rhythm and, if necessary, delivers an electric shock to help restore a normal heart rhythm. It is user-friendly, often accompanied by voice prompts and visual aids, which guide the user through the process of defibrillation, making it accessible even to those without extensive medical training.

Other options serve different purposes: CPR refers to Cardiopulmonary Resuscitation, a life-saving technique used in emergencies when someone's heartbeat or breathing has stopped. ECG, or Electrocardiogram, is a test that records the electrical activity of the heart but does not deliver shocks. EMS stands for Emergency Medical Services, the service that provides emergency medical assistance, rather than a specific device. Understanding these distinctions is key in emergency medical contexts, where clarity on terms can significantly impact patient outcomes.