Using a 24-hour ECG machine

Small adhesive electrodes on the chest connect by wires to a portable recorder. The recording can capture rhythm changes that may not be present during a short ECG in a clinic, especially when symptoms come and go.

Clinicians compare the electrical trace with the time of palpitations, dizziness, breathlessness, chest discomfort, sleep, exercise, and medicines. A monitor records rhythm rather than making a diagnosis on its own. A normal recording is most informative when the symptom being investigated happened while the device was attached.

Keep the recorder and electrodes dry, and follow the fitting team's instructions about bathing and exercise. Wear clothing that does not pull on the leads. If an electrode loosens, use the instructions supplied by the clinic; note the time if you reconnect it or cannot restore contact.

Use the diary or event button exactly as explained. Record the time, symptom, activity, and any medicine taken. Continue a representative routine unless the clinician placed restrictions, because matching real-life events to the trace is central to interpretation.

This machine does not summon help or provide real-time medical supervision. Call emergency services for severe chest pain, collapse, major breathing difficulty, or palpitations accompanied by fainting or near-fainting. Follow urgent clinical advice even if the recorder is still running. For blistering, substantial skin swelling, or equipment failure without emergency symptoms, contact the monitoring service.

Confirm which activities are permitted, what to do if a lead comes off, how to mark an episode, and where to return the device. When results are available, ask whether your symptoms occurred during recording, whether they matched a rhythm change, and whether you need longer monitoring or another test.