An ECG machine, or electrocardiogram machine, is a medical device that records the electrical activity of the heart. It uses small sensors called electrodes placed on the skin to detect heartbeats and create a visual representation of the heart's rhythm. This information helps doctors identify any irregularities or issues with the heart's function. The ECG test is quick, painless, and non-invasive, making it a common procedure in hospitals and clinics. By analyzing the results, healthcare professionals can diagnose conditions like arrhythmias, heart attacks, and other heart-related problems, ensuring patients receive the appropriate care and treatment.