Explanted Relay dual chamber demand pacemaker, with two leads, ends missing, senses and delivers pulses to both the atrium and ventricle, with sensor enabling response to variations in activity by wearer, by Intermedics SA, Switzerland, from St George's Hospital, Tooting, 1993. Explanted Relay Dual Chamber Demand pacemaker 1993
Pacemaker, external model, prototype made at Hammersmith, battery powered, without catheter, c.1958 Pacemaker, external model
Explanted Legend II™ single chamber demand pacemaker, with sensor enabling response to variations in activity by wearer, by Medtronic, Holland, from St George's Hospital, Tooting, 1993 Explanted Legend II™ single chamber demand pacemaker 1993
Explanted Trios single chamber demand pacemaker, by Biotronik, Germany, serial no. 37430629, fitted with bipolar lead with tined end for trapping in endocardial muscles, by Telectronics, from St George's Hospital, Tooting, 1991-3 Explanted Trios single chamber demand pacemaker 1991-1993