Emergency Room With Electrocardiography Line Royalty-Free Stock Photo

Electrocardiography is the process of producing an electrocardiogram ECG or EKG, a recording of the heart`s electrical activity. It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart using electrodes placed on the skin. These electrodes detect the small electrical changes that are a consequence of cardiac muscle depolarization followed by repolarization during each cardiac cycle heartbeat.