A resting electrocardiogram (ECG) is a fundamental screening tool employed by physicians to determine the heart's rhythm and electrical activity at rest. During this test, small electrodes are affixed to the chest, limbs, and occasionally the extremities. These electrodes transmit the heart's electrical signals, which are then plotted on a monitor

A still electrocardiogram (ECG) is a/represents/provides a snapshot/picture/recording of the electrical activity/heartbeat rhythm/heart's signals in your heart/cardiac system. During/Throughout/While performing this test, you will lie down/you are seated comfortably/you remain relaxed on a bed/table/couch, and electrodes/sensors/leads are attached