| http://www.w3.org/ns/prov#value | - One prior art embodiment utilized dual sensing electrodes and suggests the heart action is 15 to 20 milliseconds after the stimulus. (See Goldreyer, U.S. Pat. No. 4,365,639.) However, the time delay varies considerablydepending on the patent, administered drugs, electrolyte balance, proximity of sensing electrode to stimulating electrode and other factors.
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