Electrocardiogram (ECG) is a medical test that is used to record the electrical activity of the heart. It is a non-invasive test that helps to diagnose heart problems by measuring the electrical impulses that control the heart’s rhythm and rate. ECG is a standard diagnostic tool that is commonly used to evaluate patients with symptoms such as chest pain, shortness of breath, dizziness, and palpitations. The test is performed by attaching small, sticky patches called electrodes to the patient’s chest, arms, and legs, which are connected to a machine that records the heart’s electrical signals. The test is painless and takes only a few minutes to complete. The results of the ECG are interpreted by a physician, who can detect any abnormal patterns or rhythms that may indicate heart problems.