The value of an oscilloscope in routine checking of pacemakers

Abstract

An evaluation has been made of the usefulness of the oscilloscope at routine check-ups of cardiac pacemakers. Measurements of 100 consecutive implanted pacemakers, obtained after their removal have been compared with changes in rate and changes in impulse duration and amplitude obtained at previous routine controls. Other changes in pacemaker characteristics have also been evaluated.Eight faulty pacemakers were found. Six had a decreased voltage, none however, less than 3.5 volts. Five