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US 4,535,776 AGranted
Cardiac pacemaker with two unipolar electrodes
AssigneeSiemens Aktiengesellschaft
InventorsHans G. Strandberg, Hans Andersen
Life of this patent
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Abstract
To make it possible to suppress spurious signals of any type without having a negative effect on the stimulation or detection characteristics of a cardiac pacemaker, a signal processing unit is provided which prevents control signals from being applied to the device for controlling the heart stimulation pulses when signals from the two unipolar pacemaker electrodes are received at substantially the same time.
Claims5
In a cardiac pacemaker comprising (a) two unipolar electrodes;
- (b) one indifferent electrode, (c) a series-connected amplifier and detector coupled to each of said unipolar electrodes, and (d) means for generating and controlling heart stimulation pulses in dependence upon the ouput signals of said detectors;
- the improvement comprising signal processing means, responsive to said output signals of said detectors, for suppressing the application of said output signals to said means for generating heart stimulation pulses when both of said detectors produce output signals at substantially the same time.
Dependencies are inferred from the claim text.