An electrocardiogram (ECG or EKG) is a simple, non-invasive medical test used to measure the electrical activity of the heart. During an ECG, small adhesive electrodes are placed on the chest, arms, and legs to detect electrical signals that trigger each heartbeat. These signals are recorded as waves on a graph, allowing healthcare professionals to evaluate heart rhythm, rate, and overall cardiac function. An ECG helps identify arrhythmias, heart block, myocardial ischemia, previous heart attacks, and other cardiac abnormalities. It is commonly performed when patients experience chest pain, palpitations, dizziness, shortness of breath, or before surgical procedures. The test is quick, painless, and typically completed within a few minutes. Because it provides immediate information, the ECG is a vital tool in emergency care and routine cardiac assessments. Its accuracy and simplicity make it one of the most widely used diagnostic tests in medicine. Additional charges may be levied for providing home services.