What should you know about a Maestro ECG machine?

An ECG, or electrocardiogram, produces a tracing of electrical activity from electrodes placed on the chest and limbs. It can help a clinician assess heart rate, rhythm and the pattern of electrical conduction. It may also provide clues about strain, reduced blood flow or a previous heart injury, but the tracing must be interpreted with symptoms and the clinical history.

The machine records signals; it does not independently decide what a result means. Movement, shivering, loose electrodes, lotions or electrical interference can create artefacts. A clinician may repeat the recording or recommend another test if the tracing does not match the symptoms.

Wear clothing that allows access to the chest, wrists and ankles. Rest quietly before and during the recording, breathe normally, and tell the staff about chest discomfort, palpitations, breathlessness or fainting. Avoid applying body lotion to electrode sites on the day when possible.

The electrodes are attached to the skin and then removed; the adhesive may feel mildly uncomfortable, especially on hairy skin. An ECG is a brief snapshot, so a normal tracing does not explain every episode of intermittent palpitations. Further monitoring may be discussed when symptoms come and go.

Call emergency services for chest pressure or pain that is severe, persistent or spreading to the arm, back, neck or jaw, especially with sweating, nausea, breathlessness or fainting. Seek urgent help for sudden severe breathlessness, collapse or a new irregular heartbeat with marked weakness.

Do not wait for an ECG appointment during a concerning episode. If symptoms are milder but recurrent, arrange a GP assessment and record when they occur, what you were doing and how long they lasted.

Ask: What does my tracing show about rate and rhythm? Was the recording clear? Could my symptoms require longer monitoring? Do my medicines or medical history change the next step?