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John hopps invented the first external pacemaker.
Later Earl Bakken improved this pacemaker by making it battery powered.
And then Wilson Greatbatch invented the first implantable pacemaker!
Artificial cardiac pacemaker was created in 1959.
-in the 1930's Albert S. Hyman
An Artificial Pacemaker basically regulates the rate of the heart beat depending on the needs of the body.