A cardiac event recorder is a battery-powered portable device use to record heart’s electrical activity (ECG) when experiencing symptoms like palpitation, dizziness and even fainting spell. It functions as a long term monitoring device to help cardiologist diagnose heart symptoms that come and go, or happen once in a while.

An event recorder is slightly smaller than a holter and can be worn for weeks or until symptoms occur. When experiencing symptoms like palpitation or dizzyness, patient can place the recorder near the chest and push button to start recording the heart rhythms. The recorded reading can be brought back to clinic for the data to be downloaded and analysed by a cardiologist. Depending on the devices used, some recorders are able to store and transmit data via email to the cardiologist.