Wilson Greatbatch - The Chardack-Greatbatch Pacemaker

The Chardack-Greatbatch Pacemaker

The Chardack-Greatbatch pacemaker used Mallory mercuric oxide-zinc cells (mercury battery) for its energy source, driving a two transistor, transformer coupled blocking oscillator circuit, all encapsulated in epoxy resin, then coupled to electrodes placed into the myocardium of the patient's heart. This patented innovation led to the Medtronic company of Minneapolis commencing manufacture and further development of artificial cardiac pacemakers.