What should you know about portable 12 lead ecg?

An ECG uses electrodes placed on the chest and limbs to detect electrical signals produced by each heartbeat. Twelve leads provide different views of those signals, helping a clinician assess rhythm and patterns that may suggest strain or reduced blood flow. A portable unit is designed to be moved to a bedside, clinic room, ambulance or community setting. It is a recording tool, not a diagnosis on its own. Learn more about the [ECG Machine](/technology/ecg-machine/) and [Electrocardiogram](/treatments/diagnostics-and-screening/ecg/).

Wear clothing that allows access to the chest, ankles and wrists. The skin may be cleaned before electrodes are attached. Remain still and avoid talking during the brief recording so movement does not add interference. Tell the operator about chest symptoms, palpitations, fainting, medicines and implanted devices. Keep the report and ask when the result will be reviewed; a normal tracing does not explain every cause of symptoms.

Call emergency services for chest pressure, severe breathlessness, collapse, new weakness on one side or a fast or irregular heartbeat with faintness. Do not wait for a planned portable ECG if symptoms are severe or rapidly worsening. Contact the requesting clinician promptly if repeated palpitations, dizziness or fainting continue.

Ask what question the ECG is investigating, whether you need monitoring beyond one recording, when results will be explained, and what symptoms should prompt urgent help.