Transtelephonic monitoring (TTM) is a technology that allows patients to report symptoms and/or transmit data from a medical device (usually a pacemaker) over the phone for medical evaluation by their physician. TTM is useful in evaluating symptoms that occur only rarely and/or sporadically, which may not show any signs during a routine office visit. Data that is transmitted can also help the physician evaluate and fine tune medications that were prescribed to the patient, such as antiarrhythmic drugs. For patients recovering from a heart attack, TTM can monitor their progress upon being discharged from the hospital.

When unusual symptoms occur, the patient can phone the monitoring station and do one or more of the following:

Patients are normally requested to transmit their data every one to two months, or whenever the patient or the physician is concerned that the device is not functioning normally.