An electrocardiogram (ECG) is a medical procedure performed by placing electrodes on specific areas of the body to measure and record the electrical activity of the heart muscle. During this procedure, a total of ten electrodes are typically applied: six to the chest area and four to the arms and legs (two on each). These electrodes detect the electrical impulses generated during the contraction and relaxation of the heart's atria and ventricles, which are then monitored and recorded on a graph.

The ECG procedure involves the following steps:

1. Preparation: The patient is asked to remove clothing from the waist up, and a gown is provided to ensure privacy.
2. Positioning: The patient lies on an examination table or a flat surface, instructed to remain still and avoid speaking during the procedure.
3. Electrode Placement: Ten electrodes are placed on specific points on the chest, arms, and legs, often with the aid of a special gel.
4. Recording: The ECG device is started, and the heart's electrical activities are immediately recorded graphically.
5. Completion: Once the recording is complete, healthcare personnel safely remove the electrodes.
6. Evaluation: The acquired ECG data is thoroughly examined and interpreted by a specialist cardiologist.