3669120 is referenced by 43 patents and cites 5 patents.

A Pacemaker of the demand type having an output control circuit arranged to control the produced pace impulses in such a manner that the amplitude of each impulse is slightly less than that of the preceding impulse. When the amplitude has decreased below the threshold value so that a heart impulse fails to occur within a predetermined period, a reset circuit will cause another pace impulse to be produced having a given initial amplitude.

Device for starting or stimulating heart contractions
Application Number
Publication Number
Application Date
July 9, 1970
Publication Date
June 13, 1972
Nielsen Lars Stig
Christian Rovsing
A61n 01/36
A61N 01/365
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