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US 4,052,991 AGranted
Method of stimulating the heart
OwnerFred Zacoutoinventor
Life of this patent
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OwnerFred Zacoutoinventor
Estimating the term…
Device and method for stimulating the heart. The device comprises means for producing stimulating pulses at regular intervals and means responsive to spontaneous heart signals for controlling the transmission of said pulses to the heart in dependence upon the timing and magnitude of the spontaneous heart signals and/or the average intramyocardial pressure. The method comprises producing stimulating pulses at regular intervals and controlling the transmission of stimulating pulses, in response to spontaneous heart signals, in dependence on the timing and magnitude of the spontaneous heart signals. In the absence of spontaneous heart signals, stimulating pulses are produced at predetermined intervals. When spontaneous heart signals occur, an adjustable waiting period is introduced in which to allow a second spontaneous signal instead of a stimulating pulse. The duration of the waiting period is varied as a function of the interval of time which separates two consecutive spontaneous detected signals (i.e., not separated by any artificially induced heart signal).
A method of electrically stimulating the cardiac muscle by means of an automatic device comprising heart stimulating and detecting means, which method comprises the steps of:
In an automatic device for electrically stimulating the cardiac muscle, comprising heart stimulating and detecting means, means for transmitting electrical stimulating pulses to the cardiac muscle at a predetermined frequency in the absence of a spontaneous heart signal and means for suspending the transmission of an electrical stimulating pulse for a waiting period when a spontaneous signal is detected, the improvement which comprises first counting means for periodically counting a predetermined total number of detected heart signals, second counting means for simultaneously counting the detected dangerous heart signals and means responsive thereto for temporarily stimulating the cardiac muscle at an increased frequency when the number of counted dangerous heart signals reaches a predetermined number less than or equal to said total predetermined number.
A method of electrically stimulating the cardiac muscle by means of an automatic device comprising heart stimulating and detecting means, which method comprises the steps of:
Dependencies are inferred from the claim text.