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Cardiac stimulation devices and methods for measuring impedances associated with the left side of the heart

  • US 20020002389A1
  • Filed: 05/14/2001
  • Published: 01/03/2002
  • Est. Priority Date: 05/15/2000
  • Status: Abandoned Application
First Claim
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1. A cardiac stimulation device comprising:

  • a first pair of electrodes configured for placement internally in a patient and in operable association with the patient'"'"'s heart;

    a current source operably associated with the first pair of electrodes and configured to produce a current therebetween;

    a second pair of electrodes configured for placement internally in a patient and in operable association with the patient'"'"'s heart, at least one of the electrodes of the second pair of electrodes being configured for placement in association with the left side of the patient'"'"'s heart;

    a voltage measuring circuit operably associated with the second pair of electrodes and configured to measure a voltage therebetween responsive to the current produced by the current source;

    an impedance measuring circuit configured for measuring impedance as a function of the current produced by the current source and the voltage measured by the voltage measuring circuit; and

    a stimulation circuit associated with the impedance measuring circuit and configured to stimulate the patient'"'"'s heart as a function of the measured impedance.

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