Pulse width cardiac pacing apparatus
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United States of America Patent
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May 4, 2004
Grant Date -
Mar 6, 2003
app pub date -
Aug 30, 2001
filing date -
Aug 30, 2001
priority date (Note) -
Expired
status (Latency Note)
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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.
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