An assembly of devices designed to analyse the performance of an implanted pacemaker based on electrocardiographic measurements that can be monitored transtelephonically. It typically includes a computer-based pacemaker analyser, a 12-lead electrocardiograph (ECG), and a transtelephonic receiver and/or transmitter. It provides data taken directly from the patient (e.g., ECG electrodes are applied to the patient and a test magnet is placed over the pacemaker to activate it) or a pacemaker programmer. Signals are sent to the receiver where pacemaker function information is displayed. This system may also include a database that collects and stores patient data.