[Importance of ECG in the monitoring of patients with pacemakers].

As treatment method of choice in permanent bradycardic disturbances of cardiac rhythm the control of pacemaker patients increasingly obtained importance. The knowledge of the normal as well as the disturbed pacemaker ECG is one condition for the optimal care of pacemaker patients, since more and more practicing physicians are involved into this responsible activity. After description of the ECG in intact pacemaker function (including the possibilities of errors) the disturbances most frequently observed in practice (change of the pacemaker frequency, deficits of synchronisation and stimulation) are dealt with and explained.