5200 series implantable Unipolar cardiovascular pacemaker, type VV1, by APC Medical Ltd., Hertford, England, 1980
Within the chest cavity of this plastic model is an example of an internal pacemaker. Artificial pacemakers use tiny electrical signals to stimulate hearts to beat when a person’s natural pacemaker has failed. A catheter from the pacemaker runs through a vein into the right heart chamber. The pacemaker uses a lithium battery to generate an electrical impulse stimulating the heart. Batteries in pacemakers last for six to ten years. It was made in England by APC Medical Limited. Approximately 25,000 pacemakers are implanted in the UK each year.