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Pulse width cardiac pacing apparatus

  • US 6,731,979 B2
  • Filed: 08/30/2001
  • Issued: 05/04/2004
  • Est. Priority Date: 08/30/2001
  • Status: Expired due to Fees
First Claim
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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:

  • (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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