What is the Medical term meaning record of the heartbeat?

Electrocardiogram [EKG or ECG] (electro = electrical + card = heart + gram = writing) is the electrical expression of the heartbeat recorded on a tape or specific sheet of paper for this purpose. An ECG is used to measure the rate and regularity of heartbeats, as well as the size and position of the chambers, the presence of any damage to the heart, and the effects of drugs or devices used to regulate the heart, such as a pacemaker.