1
Lanny Louis Lewyn, Glen David Simpson: Cardiac pacer system and method with capture verification signal. American Hospital Supply Corporation, Emrich Root O Keeffe & Lee, September 19, 1978: US04114627 (86 worldwide citation)

A cardiac pacer system includes a pulse generator for generating a stimulating signal coupled through an output coupling capacitor to a single heart-engaging electrode. An amplifier is coupled to the electrode for sensing an R wave. Immediately upon initiation of the stimulating pulse, a discharging ...


2
Howard C Hughes Jr, Robert R Brownlee, G Frank O Tyers: Cardiac pacer system and method. Research Corporation, Cooper Dunham Clark Griffin & Moran, August 31, 1976: US03977411 (17 worldwide citation)

A cardiac pacer system includes a first relatively large contact area electrode for sensing cardiac activity and a second electrode of substantially smaller contact area than the first to apply artificial stimulating pulses to the heart. The first electrode has a sufficiently large contact area to a ...