What should you know about using an ECG machine with a patient?

A healthcare professional explains the procedure, protects privacy, and places sensors on prepared skin. The patient normally lies still and breathes normally while the machine detects the heart's electrical signals. Talking, shivering, tense muscles, wet skin, or a loose sensor can add interference. Staff may need to reposition a sensor or repeat the tracing if the waves are unclear.

The machine records rather than treats the heart. Its automated comments can help identify patterns, but the clinician must check the tracing and consider symptoms, examination findings, medicines, and previous results.

Tell staff about adhesive reactions, chest wounds, implanted devices, severe pain, or difficulty lying flat. Wear clothing that permits access without unnecessary exposure. Ask the team to explain each step, and report discomfort, dizziness, chest symptoms, or breathlessness during the recording. Afterward, ask when the result will be reviewed and whether a repeat or longer monitor is needed.

Seek emergency help for severe or ongoing chest pain or pressure, severe difficulty breathing, fainting, sudden confusion, or a rapid or irregular heartbeat with marked weakness. Tell the care team immediately if these symptoms begin during the recording; do not wait for the printed report.

Ask: Where will the sensors be placed? What should I do if the adhesive irritates my skin? Was the tracing clear? Who interpreted it? Could my symptoms have been missed because they were not happening then?