This test is used to monitor your heartbeat continuosly over a period of up to several days. During this time you wear a small recorder (monitor) about the size of a mobile phone. The monitor is attached to your body by means of electrodes similar to those used when recording an ECG. Whilst you are wearing the monitor if say you experience your symptoms at 4:00 pm we ask you to make a note on a diary card. When the monitor is taken off the recording is analysed and we can see what your heart rate and rhytm at the time you had symptoms. We encourage you to carry on normal activities whilst you are wearing the recorder. However you cannot use the shower, bath or go swimming during this time. In a small number of cases the recording fails for technical reasons and has to be repeated.