Internal cardiac pacemaker, 1961-1962.
3 6 c m
actual image size: 32cm x 28cm

Internal cardiac pacemaker, 1961-1962.

© Science Museum / Science & Society Picture Library


The first implantable pacemaker made at St George's Hospital. In 1952, an American, Paul Zoll, had been the first to resuscitate a human heart using an electrical stimulus. At St George's, a team were treating patients with Stokes-Adams disease (heart block). Due to problems of infection during experiments using external pacemakers, Geoffrey Davies, a senior cardiac technician, designed an internal pacemaker. This became the main device in use at St George's for conditions where the control of the heart's rhythm was affected.

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