An EKG, or electrocardiogram, is a test that measures the electrical activity of the heart. It records the heart's rhythm and can help identify various heart conditions, such as arrhythmias, heart attacks, and other cardiac issues. During the test, small electrodes are placed on the skin to detect electrical signals produced by the heart as it beats. The results of an EKG are displayed as a series of waves on a graph, which healthcare providers analyze to assess heart health. This non-invasive procedure is quick, typically taking only a few minutes, and is commonly used in hospitals, clinics, and during routine check-ups.