An ECG (Electrocardiogram) is a medical test that records the electrical activity of the heart over a short period, typically a few seconds. It provides valuable insights into the heart’s rhythm, rate, and overall electrical function. Electrodes are placed on the skin, and they pick up electrical signals, which are then graphically represented as waves on a monitor or paper printout. ECGs are used to diagnose a wide range of heart conditions, from arrhythmias and coronary artery disease to heart attacks and structural abnormalities. This simple, non-invasive test is a fundamental tool in cardiology for both diagnosing heart disorders and monitoring heart health.