What term means a record or picture of the electrical activity heart?

The correct answer is electrocardiogram. An electrocardiogram (ECG) is a graphic tracing of the electrical signals produced by the cells in the heart muscle during each heartbeat. It is a non-invasive procedure that is used to diagnose and monitor heart conditions. The ECG is recorded using electrodes that are placed on the skin of the chest, arms, and legs. The electrodes detect the electrical signals from the heart and transmit them to a machine that records the ECG trace. The ECG trace can be used to measure the heart rate, rhythm, and any abnormalities in the heart's electrical activity.