Pulse width cardiac pacing apparatus
First Claim
1. A cardiac assist system comprising means for delivering a first pacing pulse from said system to a heart, means for ceasing the delivery of said first pacing pulse to said heart, means for sensing whether said heart is beating, and means for delivering a second pacing pulse from said system to said heart, wherein:
- (a) said first pacing pulse and said second pacing pulse are delivered to said heart within a period of less than about 100 milliseconds, wherein;
1. each of said first pacing pulse and said second pacing pulse has a voltage of from about 2 to about 5 volts direct current, 2. a time between said delivery of said first pacing pulse and said second pacing pulse is at least about 1 microsecond, (b) said first pacing pulse and said second pacing pulse are delivered to said heart at a frequency of from about 2 kilohertz to about 5 megahertz, (c) said first pacing pulse and said second pacing pulse each have a duration of from about 0.1 microseconds to about 500 milliseconds, and (d) said cardiac assist system is comprised of means for varying at least one property of a pacing pulse selected from the group consisting of said first pacing pulse, said second pacing pulse, and both said first pacing pulse and said second pacing pulse.
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Accused Products
Abstract
A cardiac assist system containing a device for delivering a first pacing pulse from said system to a heart, for ceasing the delivery of said first pacing pulse to said heart, for sensing whether the heart is beating, and for delivering a second pacing pulse from said system to the heart. Each of the first pacing pulse and the second pacing pulse are delivered to the heart within a period of less than about 100 milliseconds, and has a voltage of from about 2 to about 5 volts direct current. The time between the delivery of the first pacing pulse and the second pacing pulse is at least about 1 microsecond. The first pacing pulse and the second pacing pulse are delivered to the heart at a frequency of from about 2 kiloherz to about 5 megahertz; and they each have a duration of from about 0.1 microseconds to about 500 milliseconds. The cardiac assist system also contains a device for varying the voltage and/or the frequency of each of the pacing pulses.
421 Citations
14 Claims
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1. A cardiac assist system comprising means for delivering a first pacing pulse from said system to a heart, means for ceasing the delivery of said first pacing pulse to said heart, means for sensing whether said heart is beating, and means for delivering a second pacing pulse from said system to said heart, wherein:
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(a) said first pacing pulse and said second pacing pulse are delivered to said heart within a period of less than about 100 milliseconds, wherein;
1. each of said first pacing pulse and said second pacing pulse has a voltage of from about 2 to about 5 volts direct current, 2. a time between said delivery of said first pacing pulse and said second pacing pulse is at least about 1 microsecond, (b) said first pacing pulse and said second pacing pulse are delivered to said heart at a frequency of from about 2 kilohertz to about 5 megahertz, (c) said first pacing pulse and said second pacing pulse each have a duration of from about 0.1 microseconds to about 500 milliseconds, and (d) said cardiac assist system is comprised of means for varying at least one property of a pacing pulse selected from the group consisting of said first pacing pulse, said second pacing pulse, and both said first pacing pulse and said second pacing pulse.
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2. The cardiac assist system as recited in claim 1, wherein said cardiac assist system comprises a first sensing electrode and a second sensing electrode.
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3. The cardiac assist system as recited in claim 2, wherein said cardiac assist system comprises a first pacing electrode and second pacing electrode.
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4. The cardiac assist system as recited in claim 3, wherein each of said first sensing electrode and said second sensing electrode is disposed at a distance of at least about 5 millimeters from each of said first pacing electrode and said second pacing electrode.
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5. The cardiac assist system as recited in claim 1, wherein said time between said delivery of said first pacing pulse and said second pacing pulse is from about 1 microsecond to about 100 microseconds.
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6. The cardiac assist system as recited in claim 1, wherein said cardiac assist system is adapted to be disposed within a biological organism.
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7. The cardiac assist system as recited in claim 1, further comprising a first receiver for receiving information.
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8. The cardiac assist system as recited in claim 7, wherein said receiver is a first transceiver.
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9. The cardiac assist system as recited in claim 8, wherein said cardiac assist system is comprised of a second transceiver.
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10. The cardiac assist system as recited in claim 9, wherein said second transceiver is operatively connected to said means for delivering a first pacing pulse from said system to said heart, and to said means for delivering a second pacing pulse from said system to said heart.
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11. The cardiac assist system as recited in claim 1, wherein said cardiac assist system further comprises a defibrillator.
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12. The cardiac assist system as recited in claim 1, wherein said cardiac assist system is comprised of means for controlling cardiac arrhythmia.
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13. The cardiac assist system as recited in claim 1, wherein said means for delivering a first pacing pulse from said system to said heart is a variable means for delivering a variable pacing signal from said system to said heart.
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14. The cardiac assist system as recited in claim 1, wherein said means for delivering a second pacing pulse from said system to said heart is a variable means for delivering a variable pacing signal from said system to said heart.
Specification