Multi-site impedance sensor using coronary sinus/vein electrodes
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United States of America Patent
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Aug 21, 2001
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N/A
app pub date -
Jun 21, 1999
filing date -
Jun 21, 1999
priority date (Note) -
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Abstract
A method and apparatus for performing impedance plethysmography on a living heart for diagnostic and therapy purposes involves placement of plural leads where at least one is disposed within a coronary vein traversing the myocardium on the left side of the heart with another lead having plural electrodes thereon disposed in the right ventricle. By appropriate selection of electrodes on the first and second leads for driving with an AC carrier signal and other such electrodes coupled to a sensing amplifier, an impedance vs. time signal can be derived that when signal processed provides useful information concerning cardiac performance. The multi-site impedance sensing has been found to yield more robust data especially in patients having CHF.
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