24 HOUR HOLTER MONITORING
A Holter monitor is a way of taking an ECG continuously for 24 hours or more. An ECG, or electrocardiogram, is an electrical trace of your heartbeat and – in combination with physical examination and other tests – can be an extremely useful test, especially if you suffer symptoms such as palpitations, funny turns, dizziness, blackouts or fainting.
You wear the device while you go about your daily activities (including sleep) and it records your heart rhythm and electrical activity. It is fitted by a technician at a laboratory (to which your doctor will refer you).