An electrocardiogram, also known as EKG or ECG, records your heart’s electrical activity. This offers healthcare providers information regarding your heart’s rhythm and rate, as well as diagnosing a range of heart conditions. Sensing electrodes, small adhesive patches with wires connected to a monitor, are placed on your skin in the chest, arm, and leg areas. The monitor then notes and displays the electrical activity of your heart. The number of electrodes used during this procedure depends on the information desired by your healthcare providers.