A nurse is preparing the client for an electrocardiogram (ECG). The client asks the nurse what is an electrocardiogram.Which is the best description for an electrocardiogram?

Electrical representations of the cardiac cycle that are documented by deflections on recording paper.

The amount of blood ejected from the left ventricle over 1 minute.

The amount of blood that is ejected with every heartbeat.

Electrical impulses of the heart displayed on a screen.