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Difibrillation system

  • US 5,423,864 A
  • Filed: 12/02/1993
  • Issued: 06/13/1995
  • Est. Priority Date: 12/11/1992
  • Status: Expired due to Term
First Claim
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1. A defibrillation system comprising:

  • stimulator means for generating defibrillation pulses;

    at least two defibrillation electrodes connected to said stimulator means, at least one of said defibrillation electrodes being adapted for intracardiac placement;

    said at least one defibrillation electrode adapted intracardiac placement including a flexible electrode cable having a proximal end connected to said stimulator means and a distal end having an electrode head with an expandable component carrying at least one defibrillation surface for delivering said defibrillation pulses to a heart;

    means for expanding said expandable component from a non-expanded state wherein said electrode head does not impede blood flow to said heart, to an expanded state;

    control means for sensing conditions indicative of a fibrillation episode of said heart and for supplying a control signal identifying a duration of said fibrillation episode to said stimulator means and to said means for expanding for causing said means for expanding to expand said expandable component of said electrode head from said non-expanded state to said expanded state for said duration of said fibrillation episode and for causing said stimulator means to generate said defibrillation pulses while said expandable component is in said expanded state.

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