Holter Monitoring: provides a continuous 24 hour recording of the heart. This exam is useful in detecting irregular heartbeats. The recording device is worn on a strap at your waist or over your shoulder. The electrical signal is picked up by four small pads (electrodes) attached to your chest and these are connected to the recorder by wires. While you are wearing the Holter Monitor you will be asked to perform you daily activities and keep a diary of all your activities and symptoms.