Operating an ECG machine involves several steps: 1. Preparation: Ensure the machine is calibrated and ready for use. Gather all necessary supplies, including electrodes and conductive gel. 2. Electrode Placement: Place the electrodes on the patient’s body as per the standard 12-lead ECG configuration. Correct placement is essential for accurate readings. 3. Recording: Instruct the patient to remain still and breathe normally. Start the machine to record the ECG trace. 4. Interpretation: Once the ECG is recorded, review the data for any irregularities. Nurses should be familiar with basic ECG interpretation but can consult a physician for detailed analysis.