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Heart stimulator determining cardiac output, by measuring the systolic pressure, for controlling the stimulation

  • US 6,314,323 B1
  • Filed: 07/06/2000
  • Issued: 11/06/2001
  • Est. Priority Date: 01/09/1998
  • Status: Expired due to Term
First Claim
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1. A heart stimulator comprising:

  • a circuit for determining cardiac output and for producing a control signal corresponding to said cardiac output;

    a controller for controlling cardiac stimulation dependent on said control signal; and

    said circuit including a pressure sensor adapted to sense pressure in a right ventricle and to generate an electrical pressure signal corresponding to the sensed pressure, an integrator supplied with said pressure signal which integrates said pressure signal between a start time and a stop time to produce an integration result, corresponding to said cardiac output, forming said control signal, and wherein said pressure signal is bandpass filtered during a systolic phase to identify opening of a valve at said right ventricle as said start time and closing of said valve as said stop time.

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