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AUTOMATIC CARDIOVERTING CIRCUIT

  • US 3,805,795 A
  • Filed: 03/17/1972
  • Issued: 04/23/1974
  • Est. Priority Date: 03/17/1972
  • Status: Expired due to Term
First Claim
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1. Heart contraction sensing and stimulation circuit comprising:

  • a. first detecting means responsive to a change in a monitored electrical parameter produced by the normal beating action of the heart for providing a first identifiable electrical signal corresponding with each heart contraction;

    b. second detecting means responsive to monitored heart electrical activity corresponding to heart contractions for providing a second identifiable signal corresponding with each heart contraction;

    c. gating means electrically connected to receive electrical signals from said first and second detecting means, said gating means for providing an electrical output signal in response to either of said identifiable electrical signals produced by a single heart contraction;

    d. electrical energy storage means capable of storing sufficient energy to cardiovert a malfunctioning heart;

    e. electrical energy source means;

    f. control means connected in controlling relation to said energy storage means and said energy source means and operatively connected to said gating means and responsive thereto, said control means for controlling the transmission of electrical energy from said source means to said storage means only in the absence of electrical signals from both the first and second detecting means for a predetermined period of time;

    g. output means adapted for connection to the heart;

    h. regulating means connected in controlling relation to said energy storage means, said regulating means for permitting energy to be transmitted from said storage means to said output means when the energy stored by said storage means becomes greater than a predetermined level.

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