Holter Monitor: A small portable recorder that is attached to electrodes on your chest. It continuously records your heart’s rhythm for 24 hours.
Transtelephonic Monitor: A small, portable recorder that is worn continuously for an extended period of time to record and save information about your heart’s rhythm around the time you experience an arrhythmia. The recording is triggered by pushing a button (event button). The rhythm is recorded, saved, and transmitted over the phone line.